Question
A tank has a pipes attached to it, out of which 2 are
outlet pipes and the rest are inlet pipes. Each inlet pipe can fill a tank in 10 hours and each outlet pipe can empty the fall tank in 15 hours. When all the pipes are opened together then 91(2/3)% part of the tank is filled in 2(1/2) hours. What is the vase of n?Solution
The correct answer is D
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