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18 April, 04:39

A bathtub can be filled in 8 min. it takes 12 min for the bathtub to drain. if the faucet is turned on but the drain is also left open, how long will it take to fill the tub?

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  1. 18 April, 08:33
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    Time taken to fill the bathtub is 8 min

    time taken to drain the bathtub is 12 min

    fraction of bathtub filled in 1 hour=1/8

    fraction of bathtub drained in 1 hour=1/12

    fraction that will be filled in a minute given that both taps are opened at he same time:

    1/8-1/12

    =1/24

    thus time taken for the bathtub to be filled is 24 min
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