SOLUTION: Pump A can empty a pool in 20 hrs. and pump B can empty it in 24 hrs. Working together, how long will it take to empty the pool?
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Question 1115559: Pump A can empty a pool in 20 hrs. and pump B can empty it in 24 hrs. Working together, how long will it take to empty the pool? Answer by ikleyn(52788) (Show Source):
Pump A drains of the tank volume per hour.
Pump B drains of the tank volume per hour.
Working together, they drain = = of the tank volume per hour.
It means that two pipes will drain the tank in hours = hours.
Solved.
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It is a typical and standard joint work problem.
