Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opened together but afte

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Q 1414501450.     Two pipes A and B can fill a tank in 15 minutes and 20 minutes respectively. Both the pipes are opened together but after 4 minutes, pipe A is turned off. What is the total time required to fill the tank?
A

10 min. 20 sec.

B

11 min. 45 sec.

C

12 min. 30 sec

D

14 min. 40 sec.

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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