NCERT Solutions for Class 3 Maths Chapter 10 Fun at Class Party!

Exercise 10: Fun at Class Party!

Question 1. What are the various activities shown in the picture?
Answer:
Two kids are making the blackboard look pretty. One girl is finding out how tall the door is. Another two kids are checking how long the table is.
In simple words: The picture shows kids decorating their classroom. They are also measuring different things like the door and the table.

Exam Tip: Observe the picture carefully and write down each activity you see the children doing.

Question 2. How does Shelly find the height of the door?
Answer:
Shelly is using a ruler to see how tall the door is.
In simple words: Shelly measures the door's height with a ruler.

Exam Tip: Always look at the tool in the character's hand to identify how they are measuring.

Question 3. Leena and Adi use their hand spans to measure the length of the same table. Will they both get the same measurement?
Answer:
No, they will not get the same count. Hands are of different sizes for different people. So, their hand span counts will be different, even though the table is the same size.
In simple words: Since Leena and Adi have different hand sizes, they will get different hand span counts for the same table.

Exam Tip: Remember that measuring with body parts (like hand span or foot span) gives different results for different people.

Question 4. Circle the child with the longest ponytail.
Answer:
The girl standing on the bench to decorate the blackboard has the longest ponytail.
In simple words: The girl standing on the bench on the right side has the longest hair.

Exam Tip: Compare the lengths of the ponytails of all the children in the picture to find the longest one.

Question 5. Tick paper strings in the classroom that are as long as the height of the window.
Answer:
The vertical paper string hanging on the left side of the window is ticked as it is of the same length as the window's height.
In simple words: The paper garland on the left of the window is just as tall as the window.

Exam Tip: You can compare heights by looking at the start and end points of the window and the string.

Question 6. Find the distance between the two walls of the classroom. How did you find it. Can there be other way of measuring it?
Answer:
We can find the distance between the two walls by counting our foot steps (paces). Yes, we can also use other ways like using a long measuring tape, a meter scale, or a long rope.
In simple words: We can walk from one wall to the other and count our steps to find the distance. We can also use a measuring tape for a precise measurement.

Exam Tip: Mention both non-standard units (like foot steps) and standard units (like measuring tape) when discussing different ways to measure distance.

Question 7. Identify all the ways that children are using to measure length in this picture. Which way do you think is better and why?
Answer:
In the picture, children are measuring length in different ways, such as using a ruler, hand spans, foot spans, and by stretching their arms out. Out of these, using a ruler (or scale) is the best method because it gives the exact same correct measurement every time, no matter who measures.
In simple words: Children are measuring with their hands, feet, arms, and a ruler. Using a ruler is the best way because body sizes are different for everyone, but a ruler is always the same.

Exam Tip: Standard tools like scales and rulers are always better because they give a reliable and precise measurement.

Question 1. In the picture above, colour the paper strings as instructed below.
(a) Colour the shortest paper string with red. Discuss how you identified the shortest string.
(b) Colour the longest paper string with green. Discuss how you identified the longest string.
Answer:
(a) Shortest string (Red): The shortest string is the one under the blackboard with the fewest loops. We can find it by comparing its length to the others.

(b) Longest string (Green): The longest string is the one with the most loops that hangs the lowest. We can identify it easily as it stretches the longest distance.
In simple words: The shortest string is colored red, and the longest one is colored green. We can find them by comparing how long they look.

Exam Tip: To find the shortest or longest item, align their start points and look at where they end, or count their loops.

Question 2. How many more colourful paper strings will be needed to decorate the border of the green board?
Answer:
To decorate the whole border of the green blackboard, we will need 15 more colorful paper strings.
In simple words: It takes 15 more paper garlands to go all the way around the edge of the board.

Exam Tip: Count the number of strings that fit along one side of the board to estimate how many are needed for the whole border.

Question 3. How many of [marigold flower icon] are needed to decorate the entire border of the board?
Answer:
We will need 30 marigold flowers to decorate the entire border of the blackboard.
In simple words: We need 30 marigold flowers to cover the entire edge of the board.

Exam Tip: Ensure you count around all four sides of the rectangular board to find the total number of flowers needed.

Question 1. Cut and paste a wool or cotton thread as long as the line given below.
Answer:
Cut a piece of wool or cotton thread that matches the exact length of the blue line, and paste it carefully on top of the line.
In simple words: Measure the blue line with a piece of string, cut the string to that same size, and glue it down.

Exam Tip: Lay the thread along the line first, mark the end, and then make a neat cut before pasting.

Question 2. Draw a string longer than the string given below.
Answer:
Draw a new string that is longer than the given one. For example, you can draw a longer string with 5 or 6 hanging stars instead of just 3 stars.
In simple words: Draw a line that goes further to the right and add more stars to it to make it look longer.

Exam Tip: A longer line should extend further from left to right compared to the original one.

Question 3. Draw a string shorter than the decoration string Shelly and Adi are holding.
Answer:
Draw a shorter string with fewer colorful bulbs than the one held by Shelly and Adi.
In simple words: Draw a smaller string with only a few lights to make it shorter.

Exam Tip: A shorter string has fewer items (bulbs) and a smaller total length than the one in the reference picture.

Question 4. Draw the other half of the moustache which is as long as the half of the moustache on the face shown in the picture.
Answer:
Draw the missing right half of the moustache on the man's face, making sure both sides are equal in length and shape.
In simple words: Draw the other side of the mustache so both sides look exactly the same.

Exam Tip: Use the nose as the center line (line of symmetry) to ensure both halves of the moustache are equal in length.

Question 5. Look at the strings and help Adi choose the longest one. How did you find out? Discuss.
Answer:
The upper string is the longest one because it has 16 bulbs, which is more than the lower one. We can also see that it has more loops and curves, which means it would be much longer if we stretched it straight.
In simple words: The top string has 16 lights, which is more than the bottom one. If we pull both straight, the top one will go much further!

Exam Tip: When comparing curved lines, counting the repeated items (like bulbs) along them is a great way to find which is longer.

Question 1. Can you name some things that cannot pass through your school gate? Discuss.
Answer:
Things like school buses, large trucks, elephants, and aeroplanes are too big to pass through the school gate.
In simple words: Very large things like a bus or a truck cannot fit through the school gate because they are wider than the gate.

Exam Tip: Think of objects that are wider or taller than the gate's entrance to find things that cannot pass through.

Question 1. They have made the following statements. Do you think they are true for all children? Let us check. Take help from your friends to measure. Tick the correct answer.
1. Your head is 3 handspans round. True/False
2. The length of your forearm is equal to the length of your feet. True/False
3. Your height is equal to the length of your arms wide open. True/False
Answer:
1. Your head is 3 handspans round. True [Ticked]
2. The length of your forearm is equal to the length of your feet. True [Ticked]
3. Your height is equal to the length of your arms wide open. True [Ticked]
In simple words: These three facts are true for almost all kids! If you measure, you will find your head is about 3 handspans around, your forearm is as long as your foot, and your height is the same as your arm span.

Exam Tip: You can test these fun body facts yourself by using a string to measure and compare!

Question. Write the names of your friends whose heights are more than one metre and whose heights are less than one metre.
Answer:

In simple words: This table groups friends based on whether they are taller than 1 meter or shorter than 1 meter.

Exam Tip: One meter is a standard height of 100 centimeters. Use a measuring tape on the wall to check your friends' heights.

Question. Circle the tallest among these children: Who is the tallest among them? Discuss.
Answer:
The girl wearing the red dress is the tallest among the three children.
In simple words: If you look at their heights, the girl in the red dress is taller than the other two children.

Exam Tip: To compare heights when children are standing on boxes, remember to factor in the height of the box they are standing on!

Question. Write the names of the objects around you, whose length is one metre, more than one metre, and less than one metre.
Answer:

In simple words: Big things like a bed or a wardrobe are longer than 1 meter. Small things like a chair or a dustbin are shorter. Medium things like a study table can be around 1 meter long.

Exam Tip: Try measuring these common household items with a meter tape to see how close they are to 1 meter.

Question 1. Find the lengths of different objects by using one metre, half meter, and quarter metre ropes. Write their names and tick in the appropriate boxes.
Answer:

In simple words: Different objects have different lengths. Some things like a Sofa are always more than one meter, while objects like flags or books can be found in various sizes, so they can be ticked in multiple boxes.

Exam Tip: When doing this activity, use actual ropes marked at quarter, half, and full meter lengths to make accurate comparisons.

Question 2. Mark a line on the floor as a Start line and then mark another line one metre from the Start line. Stand on the Start line and jump. Write the names of children who jump more than a quarter of a meter, half of a meter and a meter.
Answer:
Based on the jumps of the children:
- More than one metre: None of the children were able to jump more than 1 meter.
- More than a half metre: Rahul, Prem
- More than a quarter metre: Aman
In simple words: We can measure how far each child jumps from the starting line. Rahul and Prem jumped the furthest (more than half a meter), while Aman jumped more than a quarter meter.

Exam Tip: A quarter meter is 25 cm, a half meter is 50 cm, and a full meter is 100 cm. Compare the jump distances to these markers to classify them.

Question 3. Take a ball or disc and try to throw it as far as you can. Now measure how far the throw was.
Answer:
The throw distances for different children are:
- Shekhar: 4 meters
- Sumit: 9 meters
- Vikas: 5 meters
- Sanjeev: 7 meters
In simple words: Each child throws the ball as hard as they can, and we measure the distance in meters. Sumit threw the ball the furthest, reaching 9 meters.

Exam Tip: Use a long measuring tape on the ground to record the throw distance from the throwing line to where the ball first lands.

Question 1. Measure the height of your teacher or parent using a metre long rope or a strip.
Answer:
The height of my parent is 1 meter and 72 cm.
In simple words: My parent is 1 meter and 72 centimeters tall.

Exam Tip: Make sure the person stands straight against a flat wall, and mark their height carefully before measuring from the floor up.

Question 2. Estimate and cut one-metre long wool or thread. Ask your friends to do the same. Now verify with the help of the metre rope whose estimate is the closest.
Answer:
When we measured all our pieces of thread, my estimate turned out to be the closest to exactly one meter.
In simple words: We guessed how long one meter is and cut a string. When we checked it, my string was the closest to the real meter.

Exam Tip: Estimating helps build a sense of how long a meter is. Practicing this often will make your guesses much more accurate.

Question 3. Cut a one-metre long rope into 4 equal pieces. How many cuts did you make?
Answer:
To divide a one-meter rope into 4 equal pieces, we need to make exactly 3 cuts.
In simple words: Making 3 cuts divides a single continuous rope into 4 separate, equal pieces.

Exam Tip: Remember that the number of cuts is always one less than the number of pieces you want to make (Cuts = Pieces - 1).

Question 4. How many footsteps fit into a metre rope?
Answer:
It takes about 5 of my footsteps to cover the length of a one-meter rope.
In simple words: If you walk along a 1-meter rope, you will take around 5 steps.

Exam Tip: Since footsteps are small for children, it takes more steps (about 5) to equal a single meter.

Question 5. Use a metre rope to find how long is a side of the class wall.
Answer:
Using the meter rope, we found that the side of our classroom wall is 4 meters long.
In simple words: The length of the classroom wall is 4 meters.

Exam Tip: Lay the meter rope end-to-end along the base of the wall to count how many times it fits.