Class 10 Maths MCQs on Frustum of a Cone and Sphere Problems
Class 10 Maths MCQs on Frustum of a Cone and Sphere Problems
Class: 10 | Subject: Mathematics
Chapter 12: Surface Areas and Volumes
Board: CBSE Board Examination (Strictly Based on Latest NCERT Curriculum)
1. Volume of a frustum of a cone is:
Correct Answer: A
Explanation: Volume of frustum = 1/3 πh (R² + r² + Rr), where R and r are radii of bases.
Explanation: Volume of frustum = 1/3 πh (R² + r² + Rr), where R and r are radii of bases.
2. Curved surface area of frustum is:
Correct Answer: A
Explanation: CSA = π(R + r)l, where l is slant height.
Explanation: CSA = π(R + r)l, where l is slant height.
3. Surface area of sphere is:
Correct Answer: A
Explanation: Surface area of sphere = 4πr².
Explanation: Surface area of sphere = 4πr².
4. Volume of sphere is:
Correct Answer: A
Explanation: Volume formula for sphere is 4/3 πr³.
Explanation: Volume formula for sphere is 4/3 πr³.
5. If R=7 cm, r=3 cm, h=10 cm, volume of frustum is:
Correct: A
Explanation: Substitute values in formula.
Explanation: Substitute values in formula.
6. If radius doubles, sphere volume becomes:
Correct: D
Explanation: Volume ∝ r³.
Explanation: Volume ∝ r³.
7. Slant height of frustum is found using:
Correct: A
Explanation: l = √(h² + (R − r)²).
Explanation: l = √(h² + (R − r)²).
8. If R=r, frustum becomes:
Correct: A
Explanation: Both bases equal means cylinder.
Explanation: Both bases equal means cylinder.
9. If r=0, frustum becomes:
Correct: B
Explanation: One radius zero gives full cone.
Explanation: One radius zero gives full cone.
10. Surface area of hemisphere is:
Correct: A
Explanation: Total surface area hemisphere = 3πr².
Explanation: Total surface area hemisphere = 3πr².
11. If height doubles, frustum volume:
Correct:A
Explanation: Volume ∝ height.
Explanation: Volume ∝ height.
12. Combined solids volume equals:
Correct:A
Explanation: Add volumes.
Explanation: Add volumes.
13. Sphere diameter is:
Correct:A
Explanation: Diameter=2r.
Explanation: Diameter=2r.
14. If sphere radius halves, volume:
Correct:A
Explanation: (1/2)³=1/8.
Explanation: (1/2)³=1/8.
15. CSA of sphere equals:
Correct:A
Explanation: Standard formula.
Explanation: Standard formula.
16. Volume of hemisphere is:
Correct:A
Explanation: Half of sphere.
Explanation: Half of sphere.
17. Frustum formed by cutting:
Correct:B
Explanation: Cutting cone parallel to base.
Explanation: Cutting cone parallel to base.
18. Total surface area of frustum includes:
Correct:B
Explanation: TSA includes both circular ends.
Explanation: TSA includes both circular ends.
19. If R=5, r=3, difference is:
Correct:A
Explanation: 5−3=2.
Explanation: 5−3=2.
20. π value in CBSE usually taken as:
Correct:A
Explanation: Standard CBSE value.
Explanation: Standard CBSE value.
