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Let the second pipe can fill tank in x hours So, first pipe fill tank in (x - 5) hours and Third pipe fill tank in (x + 5) hours According to the question, Second pipe and third pipe together take 1 hour more time to fill the tank from first pipe. So time taken by second pipe third pipe together = (x – 5 + 1) hours = (x – 4) hours 1/x + 1/(x+5) = 1/(x-4) (x +5+x )/(x2+ 5x) = 1/(x-4) (x – 4) (2x + 5) = x2+ 5x 2x2+ 5x - 8x – 20 = x2+ 5x x2- 8x – 20 = 0 x2- 10x + 2x – 20 = 0 x (x – 10) + 2 (x – 10) = 0 (x – 10) (x + 2) = 0 x = - 2, 10 So second pipe can fill the tank in 10 hours alone.
There have been reports that most of the 300 persons who were witness to the incident have flee the village to avoid questioning.
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