six taps can fill an empty cistern in 8 hours. how much more time will be taken, if 2 taps go out of order ? assume, all the taps supply water at the same rate
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4 hours will be your answer according to the question
X by 8 is equal to 6 by 4
x is equal to 6 by 4 into 8 which is equal to 12
8 hours are already spent so 12 - 8 is 4 hour
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