Pipe A is 4 times faster than pipe B and takes 45 minutes less to fill a tank When both the pipes ar...........

Quantitative Aptitude ( CCS) Pipes&cistern

Pipe A is 4 times faster than pipe B and takes 45 minutes less to fill a tank. When both the pipes are opened together than the time in which the tank will be full.

10 min

12 min

15 min

18 min

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Explanation:

Answer & Explanation
Answer – b) 12 min
Explanation :
Let A take X minute to fill a tank then B will take 4x time.
4x – x = 45 (given), X = 15.
Time taken to fill the tank together = (1/15 + 1/60)*t =1
T = 12 minute