One of them was pipe a fills the tank in x hrs pipe b empties it in y hours. How long will it take to make the tank 1/4th full?
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Time taken to make the tank 1/4th full
= 1/4 x - y
=x/4 - y
Hope this helps....
= 1/4 x - y
=x/4 - y
Hope this helps....
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