Year 6 Volume of Prisms and Cylinders Worksheet — Level 3 — Practice Set 2 — Answers
Answer sheet with worked solutions for the Year 6 volume & capacity worksheet.
Year 6 Volume of Prisms and Cylinders Worksheet — Level 3 — Practice Set 2 — Answers
Show your working. Use the π button on your calculator and round to 1 decimal place.
1.A triangular prism has a triangular end with base 16 cm and height 4 cm. The prism is 7 cm long. Find its volume.
Answer: 224 cm3
- Area of the triangle = ½ × 16 × 4 = 32 cm2
- V = area of end × length = 32 × 7
- = 224 cm3
2.A triangular prism has a triangular end with base 6 cm and height 5 cm. The prism is 10 cm long. Find its volume.
Answer: 150 cm3
- Area of the triangle = ½ × 6 × 5 = 15 cm2
- V = area of end × length = 15 × 10
- = 150 cm3
3.A cylinder has a radius of 4 cm and a height of 9 cm. Find its volume, correct to 1 decimal place.
Answer: 452.4 cm3
- V = π × r2 × h = π × 42 × 9
- = π × 144
- ≈ 452.4 cm3
4.A cylinder has a radius of 4 cm and a height of 12 cm. Find its volume, correct to 1 decimal place.
Answer: 603.2 cm3
- V = π × r2 × h = π × 42 × 12
- = π × 192
- ≈ 603.2 cm3
5.A triangular prism has a triangular end with base 10 cm and height 6 cm. The prism is 5 cm long. Find its volume.
Answer: 150 cm3
- Area of the triangle = ½ × 10 × 6 = 30 cm2
- V = area of end × length = 30 × 5
- = 150 cm3
6.A rectangular prism has a volume of 30 cm3. Its base is 3 cm by 5 cm. Find its height.
Answer: 2 cm
- Base area = 3 × 5 = 15 cm2
- Height = 30 ÷ 15 = 2 cm
7.A triangular prism has a triangular end with base 16 cm and height 2 cm. The prism is 10 cm long. Find its volume.
Answer: 160 cm3
- Area of the triangle = ½ × 16 × 2 = 16 cm2
- V = area of end × length = 16 × 10
- = 160 cm3
8.A triangular prism has a triangular end with base 22 cm and height 7 cm. The prism is 6 cm long. Find its volume.
Answer: 462 cm3
- Area of the triangle = ½ × 22 × 7 = 77 cm2
- V = area of end × length = 77 × 6
- = 462 cm3
9.A cylinder has a radius of 3 cm and a height of 12 cm. Find its volume, correct to 1 decimal place.
Answer: 339.3 cm3
- V = π × r2 × h = π × 32 × 12
- = π × 108
- ≈ 339.3 cm3
10.A triangular prism has a triangular end with base 4 cm and height 8 cm. The prism is 10 cm long. Find its volume.
Answer: 160 cm3
- Area of the triangle = ½ × 4 × 8 = 16 cm2
- V = area of end × length = 16 × 10
- = 160 cm3
Marking tips
- Give credit for correct method even when the final answer slips — the working shows where the thinking went right.
- For open-ended tasks, use the success criteria as a checklist rather than looking for one "right" answer.
- Celebrate what went well first, then pick one thing to work on next.
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