Question 30
Mensuration of SolidsA cylindrical drum of diameter 56cm contains 123.2 litres of oil when full. Find the height of the drum in centimetres. (π = 22/7)
- A.12.5
- B.25.0
- C.45.0
- D.50.0
Show the answer and explanation
Answer: D (50.0)
Explanation
123.2 litres = 123 200 cm³. Base area = (22/7) × 28² = 2464 cm², so height = 123 200 ÷ 2464 = 50 cm.