Mathematics, 16.08.2021 06:50 macylen3900

It takes 30 minutes to fill a water tank when no one is using water. When people use water or filled tank is emptied in 4 hours. How long does it take to fill the tank while the water is
being used?

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It takes 30 minutes to fill a water tank when no one is using water. When people use water or fille...

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