Question

Tap P can fill the tank in 5 hours and Tap Q can empty it in 7(1/2) hours. Tap P starts filling and they opened for 1 hour each alternatively. In what time will the tank be full?

A 12*1/2 hours Correct Answer Incorrect Answer
B 30 hours Correct Answer Incorrect Answer
C 25 hours Correct Answer Incorrect Answer
D 22 hours Correct Answer Incorrect Answer
E 15 hours Correct Answer Incorrect Answer

Solution

2 Hours = 1 work done Last work will be done by P Therefore, 15 -3 = 12

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