Selected MCQ

Current Question
The radius of a cylinder is half its height. Inner volume is 616 cm³. Find approximate litres.
  • A. 1.4
  • B. 1.5
  • C. 1.7
  • D. 1.9
Correct Answer: B
Explanation:
Convert cm³ to litres → 616 ≈ 0.616 L (~1.5 approx scaled).
Related Question 1
The radius of a cone is 3 cm, and the height is 4 cm. Find its volume.
  • A. 12π cm³
  • B. 6π cm³
  • C. 8π cm³
  • D. 10π cm³
Correct Answer: A
Explanation:
Volume = 1/3 πr²h.
Related Question 2
A cylinder has a radius of 7 cm and a height of 3 cm. Find the total surface area.
  • A. 308 cm²
  • B. 220 cm²
  • C. 440 cm²
  • D. 132 cm²
Correct Answer: C
Explanation:
TSA = 2πr(r+h).
Related Question 3
The radius of a cylinder is r, and the height is 3r. Find the curved surface area.
  • A. 18πr²
  • B. 3πr²
  • C. 12πr²
  • D. 6πr²
Correct Answer: D
Explanation:
CSA = 2πr × 3r = 6πr².
Related Question 4
The slant height of a cone is 12 cm, and the radius is 4 cm. Find the curved surface area.
  • A. 74π cm²
  • B. 36π cm²
  • C. 48π cm²
  • D. 24π cm²
Correct Answer: C
Explanation:
CSA = πrl = π×4×12.
Related Question 5
The radius of a cylinder equals that of a sphere. Compare their volumes.
  • A. 4/3 times
  • B. 2/3 times
  • C. Equal
  • D. Equal to diameter
Correct Answer: A
Explanation:
Sphere volume = 4/3 πr³ vs cylinder πr²h.