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Volume of Cylinders, Cones & Spheres — Easy Worksheet 2
Grade 8 · MathSheets Name: ____________________ Date: __________
Use π ≈ 3.14. Round to one decimal place.
How to solve
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Example
Find the volume of a cylinder with radius 2 and height 2. Use π ≈ 3.14.
Answer: 25.1
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 42 × 5 = 3.14 × 16 × 5. 16 × 5 = 80, and 3.14 × 80 = 251.2. The volume is 251.2 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 42 × 5 = 3.14 × 16 × 5. 16 × 5 = 80, and 3.14 × 80 = 251.2. The volume is 251.2 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 2 and height 2. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 V = 13 × π × r2 × h = 3.14 × 32 × 2 ÷ 3. 9 × 2 = 18, and 3.14 × 18 = 56.52, then 56.52 ÷ 3 = 18.84, which rounds to 18.8. The volume is 18.8 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = 13 × π × r2 × h = 3.14 × 32 × 2 ÷ 3. 9 × 2 = 18, and 3.14 × 18 = 56.52, then 56.52 ÷ 3 = 18.84, which rounds to 18.8. The volume is 18.8 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 4 and height 3. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 V = 43 × π × r3 = 4 × 3.14 × 43 ÷ 3. 43 = 64, 4 × 64 = 256, and 3.14 × 256 = 803.84, then 803.84 ÷ 3 = 267.946…, which rounds to 267.9. The volume is 267.9 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = 43 × π × r3 = 4 × 3.14 × 43 ÷ 3. 43 = 64, 4 × 64 = 256, and 3.14 × 256 = 803.84, then 803.84 ÷ 3 = 267.946…, which rounds to 267.9. The volume is 267.9 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 3 and height 3. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 32 × 5 = 3.14 × 9 × 5. 9 × 5 = 45, and 3.14 × 45 = 141.3. The volume is 141.3 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 32 × 5 = 3.14 × 9 × 5. 9 × 5 = 45, and 3.14 × 45 = 141.3. The volume is 141.3 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 4 and height 5. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 V = 13 × π × r2 × h = 3.14 × 32 × 4 ÷ 3. 9 × 4 = 36, and 3.14 × 36 = 113.04, then 113.04 ÷ 3 = 37.68, which rounds to 37.7. The volume is 37.7 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = 13 × π × r2 × h = 3.14 × 32 × 4 ÷ 3. 9 × 4 = 36, and 3.14 × 36 = 113.04, then 113.04 ÷ 3 = 37.68, which rounds to 37.7. The volume is 37.7 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 3 and height 4. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 32 × 2 = 3.14 × 9 × 2. 9 × 2 = 18, and 3.14 × 18 = 56.52, which rounds to 56.5. The volume is 56.5 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 32 × 2 = 3.14 × 9 × 2. 9 × 2 = 18, and 3.14 × 18 = 56.52, which rounds to 56.5. The volume is 56.5 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 2 and height 2. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 32 × 4 = 3.14 × 9 × 4. 9 × 4 = 36, and 3.14 × 36 = 113.04, which rounds to 113.0. The volume is 113.0 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = π × r2 × h = 3.14 × 32 × 4 = 3.14 × 9 × 4. 9 × 4 = 36, and 3.14 × 36 = 113.04, which rounds to 113.0. The volume is 113.0 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 3 and height 3. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 V = 13 × π × r2 × h = 3.14 × 22 × 2 ÷ 3. 4 × 2 = 8, and 3.14 × 8 = 25.12, then 25.12 ÷ 3 = 8.373…, which rounds to 8.4. The volume is 8.4 cubic units.
✓ Correct!
Not quite. The answer is
💡 V = 13 × π × r2 × h = 3.14 × 22 × 2 ÷ 3. 4 × 2 = 8, and 3.14 × 8 = 25.12, then 25.12 ÷ 3 = 8.373…, which rounds to 8.4. The volume is 8.4 cubic units.
💡 How to solve: Volume of Cylinders, Cones & Spheres
Use Cylinder: V = π × r² × h, Cone: V = 13 × π × r² × h, Sphere: V = 43 × π × r³, with π ≈ 3.14. Round your answer to one decimal place.
Try a similar one
Find the volume of a cylinder with radius 2 and height 3. Use π ≈ 3.14.
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
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Volume of Cylinders, Cones & Spheres — Easy Worksheet 2
Use π ≈ 3.14. Round to one decimal place.