CBSE Class 5 Mathematics Volume Worksheet

How do elephants talk to each other?
Answer: To find the answer to the question, we first calculate the volume of each rectangular prism (cuboid or cube) using the formula \(\text{Volume} = \text{Length} \times \text{Breadth} \times \text{Height}\) (or \(\text{side}^3\) for cubes), match each calculated volume with the letter given under each object, and place those letters into the decoder blanks in order of the given volume values.
In simple words: Calculate the volume of each 3D shape by multiplying its length, width, and height, then use the answers to decode the secret message.

Exam Tip: Always double-check the units (cm or m) and ensure all dimensions are in the same unit before multiplying.

Find the volume of the following objects. Then match the letters next to the answers to the decoder below to find the answer to the question.

Question 1. Object 1 (Jewellery box): Length = 8 cm, Breadth = 12 cm, Height = 5 cm
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(8 \times 12 \times 5\)
Volume = \(96 \times 5 = 480\) cu. cm (Letter E)
In simple words: Multiply 8, 12, and 5 to get 480 cubic centimetres, which corresponds to the letter E.

Exam Tip: The order of multiplication does not change the product; compute \(8 \times 5 = 40\) first, then multiply by 12 to get 480 easily.

Question 2. Object 2 (Small cuboid/box): Length = 6 cm, Breadth = 6 cm, Height = 12 cm
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(6 \times 6 \times 12\)
Volume = \(36 \times 12 = 432\) cu. cm (Letter B)
In simple words: Multiply 6 by 6 to get 36, then multiply by 12 to get 432 cubic centimetres, which corresponds to the letter B.

Exam Tip: Memorize squares up to 20 to speed up calculations involving equal length and breadth.

Question 3. Object 3 (Aluminium foil box): Length = 30 cm, Breadth = 5 cm, Height = 5 cm
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(30 \times 5 \times 5\)
Volume = \(30 \times 25 = 750\) cu. cm (Letter P)
In simple words: Multiply 5 by 5 to get 25, then multiply by 30 to get 750 cubic centimetres, which corresponds to the letter P.

Question 4. Object 4 (Flat box): Length = 14 cm, Breadth = 6 cm, Height = 1 cm
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(14 \times 6 \times 1\)
Volume = \(84\) cu. cm (Letter L)
In simple words: Multiply 14 by 6 to get 84 cubic centimetres, which corresponds to the letter L.

Exam Tip: Any number multiplied by 1 remains unchanged.

Question 5. Object 5 (Audio cassette box): Length = 14 cm, Breadth = 12 cm, Height = 2 cm
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(14 \times 12 \times 2\)
Volume = \(14 \times 24 = 336\) cu. cm (Letter E)
In simple words: Multiply 12 by 2 to get 24, then multiply by 14 to get 336 cubic centimetres, which corresponds to the letter E.

Exam Tip: Use standard column multiplication if mental calculation becomes difficult.

Question 6. Object 6 (Rectangular block): Length = 6 m, Breadth = 3 m, Height = 3 m
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(6 \times 3 \times 3\)
Volume = \(6 \times 9 = 54\) cu. m (Letter H)
In simple words: Multiply 3 by 3 to get 9, then multiply by 6 to get 54 cubic metres, which corresponds to the letter H.

Exam Tip: Pay close attention to whether dimensions are given in centimeters (cu. cm) or meters (cu. m).

Question 7. Object 7 (Rectangular cuboid): Length = 3 m, Breadth = 2 m, Height = 1 m
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(3 \times 2 \times 1\)
Volume = \(6\) cu. m (Letter Y)
In simple words: Multiply 3, 2, and 1 to get 6 cubic metres, which corresponds to the letter Y.

Exam Tip: Check each dimension carefully from the diagram labels.

Question 8. Object 8 (Large rectangular block): Length = 3 m, Breadth = 2 m, Height = 4 m
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(3 \times 2 \times 4\)
Volume = \(6 \times 4 = 24\) cu. m (Letter N)
In simple words: Multiply 3 by 2 to get 6, then multiply by 4 to get 24 cubic metres, which corresponds to the letter N.

Exam Tip: Ensure all three visible dimensions of a 3D cuboid are included in the product.

Question 9. Object 9 (Cube): Side = 7 m, 7 m, 7 m
Answer: Volume = \(\text{Side} \times \text{Side} \times \text{Side}\)
Volume = \(7 \times 7 \times 7\)
Volume = \(49 \times 7 = 343\) cu. m (Letter O)
In simple words: Multiply 7 by itself three times (\(7 \times 7 \times 7\)) to get 343 cubic metres, which corresponds to the letter O.

Exam Tip: A cube has all equal edges, so multiplying the side length cubed gives its volume.

Question 10. Object 10 (Small cuboid): Length = 5 cm, Breadth = 3 cm, Height = 2 cm
Answer: Volume = \(\text{Length} \times \text{Breadth} \times \text{Height}\)
Volume = \(5 \times 3 \times 2\)
Volume = \(15 \times 2 = 30\) cu. cm (Letter E)
In simple words: Multiply 5 by 3 to get 15, then multiply by 2 to get 30 cubic centimetres, which corresponds to the letter E.

Exam Tip: Multiplying 5 and 2 first gives 10, making it very easy to multiply by 3 to get 30.

Decoder Solution:
Matching the calculated volumes to the decoder blanks in order from left to right:
- 432 cu. cm = B
- 6 cu. m = Y
- 480 cu. cm = E
- 84 cu. cm = L
- 336 cu. cm = E
- 750 cu. cm = P
- 54 cu. m = H
- 343 cu. m = O
- 24 cu. m = N
- 30 cu. cm = E

Decoded Message: BY ELEPHANT PHONE!