SSC CGL 9 Aug 2015 Shift 1 Paper

Question : 110 of 200

Marks: +1, -0

A pipe can fill a tank in x hours and another can empty it in y hours. They can together fill it in (y > x)

Solution:

When both pipes are opened simultaneously, part of the tank filled in 1 hour
=

1/x-1/y

{y-x}/{xy}

∴ Required time =

{xy}/{y-x}

hours

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