SSC CGL 2 Sep 2016 Shif 2 Paper

Question : 51 of 100

Marks: +1, -0

Koushik can do a piece of work in x days and Krishnu can do the same work in y days. If they work together, then they can do the work in

Solution:

Koushik’s 1 day’s work
=

1/x

Krishnu’s 1 day’s work =

1/y

∴ One day’s work of both =

1/x+1/y

{x+y}/{xy}

∴ Required time =

{xy}/{x+y}

days

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