Q. 10 It takes 30 minutes to empty a half-full tank by draining it at a constant rate. It
is decided to simultaneously pump water into the half-full tank while draining it.
What is the rate at which water has to be pumped in so that it gets fully filled
in 10 minutes ?
(A) 4 times the draining rate
(B) 3 times the draining rate
(C) 2.5 times the draining rate
(D) 2 times the draining rate
Answer: (A)
Explanation:
