What is the total time taken to fill the tank completely?

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?

  1. 3hrs. 45 min
  2. 3 hrs 15 min
  3. 4 hrs. 15 min
  4. 4 hrs.
Anurag Mishra Professor Asked on 14th December 2015 in Maths.
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1 Answer(s)

Answer: (1) 3 hrs. 45 min.

Explanation:-
A tap  can fill a tank = 6 hours
Therefore, a tap can fill half the tank = 6/2 = 3 hours

Three more similar taps are opened,
Then, time taken by four taps = 3 x 60/4
= 45 min

Then, the total time taken to fill the tank complete = 3 hrs. 45 min.

Hence, correct answer is option (1) 3 hrs. 45 min.

Anurag Mishra Professor Answered on 15th December 2015.
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