Algorithms Quiz | Sudo Placement [1.5] | Question 1

A draining pipe takes half an hour to completely drain a tank when used alone. When it is used together with a filling pipe it takes 30 minutes to fill the tank completely. How long the filling pipe will take to fill the tank completely when used alone?
(A) 10 min
(B) 12 min
(C) 15 min
(D) 20 min

Answer: (C)
Explanation: Let filling pipe will take x minute to fill the pipe.
According to question 1 / x – 1/ 30 = 1 / 30
= 1 / x = 2 / 30
= x = 15 minute
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