NCERT Surface Areas Word Problems MCQs
NCERT Surface Areas Word Problems MCQs
Class: 10 | Subject: Mathematics
Chapter 12: Surface Areas and Volumes
Board: CBSE Board Examination (Strictly Based on Latest NCERT Curriculum)
1. A solid is a cylinder of radius 7 cm and height 10 cm. Find its curved surface area.
Correct Answer: B
Explanation: CSA = 2πrh = 2×22/7×7×10 = 880 cm².
Explanation: CSA = 2πrh = 2×22/7×7×10 = 880 cm².
2. A sphere has radius 7 cm. Find its surface area.
Correct Answer: A
Explanation: Surface area = 4πr² = 4×22/7×49 = 616 cm².
Explanation: Surface area = 4πr² = 4×22/7×49 = 616 cm².
3. A cone has radius 7 cm and slant height 25 cm. Find curved surface area.
Correct Answer: A
Explanation: CSA = πrl = 22/7×7×25 = 550 cm².
Explanation: CSA = πrl = 22/7×7×25 = 550 cm².
4. A hemisphere of radius 14 cm. Find total surface area.
Correct: A
Explanation: TSA = 3πr² = 3×22/7×196 = 1848? Correction: 3×22/7×196 = 1848 cm².
Explanation: TSA = 3πr² = 3×22/7×196 = 1848? Correction: 3×22/7×196 = 1848 cm².
5. A cube of side 7 cm. Find its total surface area.
Correct: A
Explanation: TSA = 6a² = 6×49 = 294 cm².
Explanation: TSA = 6a² = 6×49 = 294 cm².
6. Volume of cylinder r=7, h=10:
Correct:A
Explanation: πr²h=1540.
Explanation: πr²h=1540.
7. Volume of cone r=7, h=24:
Correct:A
Explanation: 1/3πr²h=1/3×154×24=1232.
Explanation: 1/3πr²h=1/3×154×24=1232.
8. Sphere volume r=7:
Correct:A
Explanation: 4/3πr³=1437.33.
Explanation: 4/3πr³=1437.33.
9. If radius doubles, surface area:
Correct:B
Explanation: Surface area ∝ r².
Explanation: Surface area ∝ r².
10. If height doubles, cylinder volume:
Correct:A
Explanation: Volume ∝ h.
Explanation: Volume ∝ h.
11. TSA of cuboid 2×3×4:
Correct:A
Explanation: 2(lb+bh+lh)=2(6+12+8)=52.
Explanation: 2(lb+bh+lh)=2(6+12+8)=52.
12. Cone volume depends on:
Correct:C
Explanation: Formula has both.
Explanation: Formula has both.
13. Hemisphere curved surface:
Correct:A
Explanation: CSA=2πr².
Explanation: CSA=2πr².
14. If slant height known, use:
Correct:A
Explanation: Cone CSA formula.
Explanation: Cone CSA formula.
15. Volume proportional to:
Correct:A
Explanation: Volume ∝ cube of radius.
Explanation: Volume ∝ cube of radius.
16. Sphere curved surface equals:
Correct:A
Explanation: Entire surface curved.
Explanation: Entire surface curved.
17. Hollow sphere volume found by:
Correct:A
Explanation: Outer − inner volume.
Explanation: Outer − inner volume.
18. If r=0, sphere volume:
Correct:A
Explanation: Zero radius means no volume.
Explanation: Zero radius means no volume.
19. Combination solids volume:
Correct:A
Explanation: Add volumes.
Explanation: Add volumes.
20. Standard π value used:
Correct:A
Explanation: CBSE standard value.
Explanation: CBSE standard value.
