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3 years ago

12

A tank can be filled by one pump in 50 minutes and by another pump in 60 minutes. A third pump can drain the tank in 75 minutes.

If all 3 pumps go into operation, how long will it take to fill the tank? help pls

1 answer:

Lubov Fominskaja [6]3 years ago

3 0

It sure take a hours to pump in the tank

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