Solution: How long will it take to fill an empty tank with all pipes in operation?

A tank can be filled in 9 hours by one pipe, 12 hours by a second pipe and can be drained when full by a third pipe in 15 hours. How long will it take to fill an empty tank with all pipes in operation? How to solve work problems?

How long will it take to fill an empty tank with all pipes in operation?

Problem Statement:

A tank can be filled in 9 hours by one pipe, 12 hours by a second pipe and can be drained when full by a third pipe in 15 hours. How long will it take to fill an empty tank with all pipes in operation?

Problem Answer:

It will take 7 hours and 50 minutes to fill an empty tank with all pipes in operation.

Solution:

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