Asked by David
A tub is filled in 20mins but there is a leakage in it which can empty the full tub in 1hr in how many minutes can it be refilled
Answers
Answered by
Reiny
effective rate of filling = tub/20 - tub/60
= tub/30
time to fill = tub/(tub/30) = ...
= tub/30
time to fill = tub/(tub/30) = ...
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