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Three pipes A, B and C are attached t...

Three pipes A, B and C are attached to a tank. A and B can fill it in 20 and 30 minutes respectively while C can empty it in 15 minutes. If A, B and C are kept open successively for 1 minute each how soon will the tank be filled?

A

2hr 44 min

B

2hr 47min

C

2hr 37min

D

2hr 40min

Text Solution

Verified by Experts

The correct Answer is:
B
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