It takes 30 minutes to empty a half-full tank by draining it at a cons – McqOptions

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1.	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» B. 3 times the draining rate

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