Samacheer Kalvi Class 5 Maths Solutions Term 1 Chapter 5 Time InText Question

Try This (Text Book Page No 75)

Question 1. Convert the given Standard Time to Railway Time, and Railway Time to Standard Time, filling in the blanks in the table below.

🎯 Exam Tip: Remember that "12 p.m." is noon, and "12 a.m." is midnight. For railway time, morning hours are the same (e.g., 3 a.m. is 03:00), while afternoon hours require adding 12 to the standard p.m. hour (e.g., 1 p.m. is 13:00).

Try This (Text Book Page No 76)

Question 2. Ravi starts school at 8:45. Is this an a.m. or p.m. time?
Answer: It is 8:45 a.m.
In simple words: School usually starts in the morning, so 8:45 in the morning is written as 8:45 a.m.

🎯 Exam Tip: Remember that 'a.m.' stands for 'ante meridiem' (before midday) and 'p.m.' stands for 'post meridiem' (after midday).

Question 3. Ramya eats lunch at 1:00. Is this an a.m. or p.m. time?
Answer: It is 1:00 p.m.
In simple words: Lunch is eaten in the afternoon, so 1:00 in the afternoon is written as 1:00 p.m.

🎯 Exam Tip: Lunchtime is typically after noon, so 1:00 in this context always refers to 1:00 p.m.

Question 4. Afrin sees the moon at 8:20. Is this an a.m. or p.m. time?
Answer: It is 8:20 p.m.
In simple words: The moon is usually seen in the night sky, so 8:20 at night is written as 8:20 p.m.

🎯 Exam Tip: Always consider the context of the activity to determine if a time is a.m. or p.m. (e.g., seeing the moon, eating lunch, starting school).

Question 5. Kavi goes to bed at 9:00. Is this an a.m. or p.m. time?
Answer: It is 9:00 p.m.
In simple words: People go to bed at night, so 9:00 at night is written as 9:00 p.m.

🎯 Exam Tip: Many daily activities happen at predictable times, helping you decide between a.m. and p.m. correctly.

Question 6. The sun rises at 6:10. Is this an a.m. or p.m. time?
Answer: It is 6:10 a.m.
In simple words: The sun rises in the morning, so 6:10 in the morning is written as 6:10 a.m.

🎯 Exam Tip: Sunrise always occurs in the early morning, which is an 'a.m.' time.

Try This (Text Book Page No 79)

Question 7. Find the time interval between the start of the afternoon class and the end of the evening class. Given:
Evening school ending time = 4 hours 10 minutes
Afternoon school starting time = 2 hours 00 minutes
Answer: To find the time interval, we subtract the starting time from the ending time.
Evening school ending time: 4 hours 10 minutes
Afternoon school starting time: 2 hours 00 minutes
Subtracting these two times gives the duration.
\[ 4 \text{ hours } 10 \text{ minutes} \]
\[ \underline{- 2 \text{ hours } 00 \text{ minutes}} \]
\[ 2 \text{ hours } 10 \text{ minutes} \]
So, the time interval is 2 hours and 10 minutes. The difference between the two times represents the total duration.
In simple words: To find how long something lasts, you take the end time and subtract the start time. Here, the class period is 2 hours and 10 minutes long.

🎯 Exam Tip: When subtracting time, always start by subtracting the minutes. If you need to borrow, remember that 1 hour is 60 minutes, not 100 minutes.