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Q.
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?
A.
3 hrs 15 min
B.
3 hrs 45 min
C.
4 hrs 15 min
D.
4 hrs 1
View Answer
Correct choice: B
Explanation:
Time taken by one tap to fill half of the tank = 3 hrs. Part filled by the four taps in 1 hour =4*1/6 =2/3 Remaining part = (1− 1 2 )= 1 2 1-12=12 2 3 : 1 2 ::1:x 23:12::1:x => x = ( 1 2 *1* 3 2 )= 3 4 12*1*32=34 So, total time taken = 3 hrs. 45 mins.
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