A tap can fill the tank in 20 mins and another tap can fill it in 25 mins if both taps are opened for 5 mins and then second tap is turned off how much time will it take to fill both the tanks
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Work done by both in 5min:(1/20 plus 1/25)
Remaining part:(1-9/20):11/20
Now,1/20 part is filled in 1min so 11/20 part will be filled in 11min.
Hence,the tank will be full in 11min more
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