CBSE Class 10 Surface Areas and Volumes MCQs – Combination of Solids
CBSE Class 10 Surface Areas and Volumes MCQs – Combination of Solids
Class: 10 | Subject: Mathematics
Chapter 12: Surface Areas and Volumes
Board: CBSE Board Examination (Strictly Based on Latest NCERT Curriculum)
1. A hemisphere is mounted on a cylinder of same radius. The total volume equals:
Correct Answer: A
Explanation: For combined solids, total volume = sum of volumes of individual solids.
Explanation: For combined solids, total volume = sum of volumes of individual solids.
2. Volume of hemisphere is:
Correct Answer: A
Explanation: Volume of sphere = 4/3 πr³, so hemisphere = half = 2/3 πr³.
Explanation: Volume of sphere = 4/3 πr³, so hemisphere = half = 2/3 πr³.
3. Volume of cone is:
Correct Answer: B
Explanation: Volume of cone = 1/3 πr²h.
Explanation: Volume of cone = 1/3 πr²h.
4. If a cone is placed over cylinder with same radius and height, total volume is:
Correct Answer: A
Explanation: Cylinder = πr²h; Cone = 1/3 πr²h; Total = 4/3 πr²h.
Explanation: Cylinder = πr²h; Cone = 1/3 πr²h; Total = 4/3 πr²h.
5. A cylinder (r=7 cm, h=10 cm) with hemisphere on top. Total volume is:
Correct: A
Explanation: Cylinder = πr²h = 1540; Hemisphere = 2/3πr³ ≈ 718.67; Sum added.
Explanation: Cylinder = πr²h = 1540; Hemisphere = 2/3πr³ ≈ 718.67; Sum added.
6. Surface area of combination excludes:
Correct: A
Explanation: Common internal surfaces are not included.
Explanation: Common internal surfaces are not included.
7. If radius doubles, volume becomes:
Correct: D
Explanation: Volume ∝ r³, so doubling radius makes 8 times.
Explanation: Volume ∝ r³, so doubling radius makes 8 times.
8. Volume of sphere is:
Correct: A
Explanation: Standard formula.
Explanation: Standard formula.
9. If cone height doubles, volume:
Correct:A
Explanation: Volume ∝ height.
Explanation: Volume ∝ height.
10. Combined volume always equals:
Correct:A
Explanation: Add volumes of parts.
Explanation: Add volumes of parts.
11. Surface area includes:
Correct:B
Explanation: Only exposed surfaces counted.
Explanation: Only exposed surfaces counted.
12. If hemisphere placed under cone, volume:
Correct:A
Explanation: Volumes added.
Explanation: Volumes added.
13. If r=3 cm, sphere volume is:
Correct:A
Explanation: 4/3π×27=36π.
Explanation: 4/3π×27=36π.
14. Curved surface of cylinder is:
Correct:A
Explanation: CSA=2πrh.
Explanation: CSA=2πrh.
15. Cone curved surface area is:
Correct:A
Explanation: CSA=πrl.
Explanation: CSA=πrl.
16. If height becomes zero, volume:
Correct:A
Explanation: No height means no volume.
Explanation: No height means no volume.
17. Combination problems require:
Correct:A
Explanation: Add or subtract volumes accordingly.
Explanation: Add or subtract volumes accordingly.
18. Sphere surface area is:
Correct:A
Explanation: Standard formula.
Explanation: Standard formula.
19. If solid is hollowed, volume is:
Correct:A
Explanation: Subtract removed part.
Explanation: Subtract removed part.
20. For accurate results use π as:
Correct:A
Explanation: Use standard CBSE value.
Explanation: Use standard CBSE value.
