1.

A tap can fill a tank in 6 hoursAfter half the tank is filled.three more similar taps areopened. What is the total timetaken to fill the tank completely

Answer»

Time taken by one tap to fillhalf of the tank= 3 hrs.

Part filled by the four taps in 1 hour =4 x1/6=2/3

Remaining part =1 -1/2=1/2

2/3:1::1 :x

So, total time taken = 3 hrs. 45 mins.



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