Question 50
Mensuration of SolidsThe radii of the base of two cylindrical tins, P and Q are r and 2r respectively. If the water level in P is 10 cm high, what would be the height of the same quantity of water in Q?
- A.2.5 cm
- B.5.0 cm
- C.7.5 cm
- D.20.0cm
Show the answer and explanation
Answer: A (2.5 cm)
Explanation
πr2 × 10 = π(2r)2 × h = 4πr2h, so h = 10/4 = 2.5 cm.