1. A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?
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By: guest on 01 Jun 2017 05.47 pm
Time taken by one tap to fill half of the tank = 3 hrs. Part filled by the four taps in 1 hour = 4 x 1 = 2 . 6 3 Remaining part = 1 - 1 = 1 . 2 2 2 : 1 :: 1 : x 3 2 x = 1 x 1 x 3 = 3 hours i.e., 45 mins. 2 2 4 So, total time taken = 3 hrs. 45 mins.