Solution: How long will it take both pumps to pump out water in the tank?

A pump can pump out water from a tank in 11 hours. Another pump can pump out water from the same tank in 20 hours. How long will it take both pumps to pump out water in the tank? How to solve work problems?

How long will it take both pumps to pump out water in the tank?

Problem Statement: ME Board February 1998

A pump can pump out water from a tank in 11 hours. Another pump can pump out water from the same tank in 20 hours. How long will it take both pumps to pump out water in the tank?

Problem Answer:

Both pumps will take 7.096 hours to pump out water in the tank.

Solution:

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