Answers

2016-02-21T17:58:36+05:30
In 1 hour

Tap A = 1/6 ( of the work) in 1 hour

Tap B = -1/8 (of the work)

Now lets Assume

Tap B is opened for x hours

Tap A is opened 2 hours earlier; 

Hence tap A is opened for x + 2 hours
1/6( x+2)  - 1/8 x = x
x/6 + 1/3 - x/8  = x

(4x - 3x - 24 x )/24    = -1/3
 -23x/24  = -1/3

x = 1/3 * 24/23  = 8/23approx 20 mins

Time it is filled

11: 20





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