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Maths Mcqs

Two pipes A and B can separately fill a tank in 2 minutes and 15 minutes respectively. Both the pipes are opened together but 4 minutes after the start the pipe A is turned off. How much time will it take to fill the tank?

A. 9 min
B. 10 minCorrect Answer
C. 11 min
D. 12 min
Correct Option: B. 10 min

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