SSC CGL Tier II 12 Apr 2015 Paper

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Question : 61 of 100

Marks: +1, -0

If x can finish a job in 4 hours and y can finish the same job in 8 hours independently, then they together will finish the job in

140 minutes
160 minutes
120 minutes
150 minutes

Solution:

(2) (x and y)’s 1 hour work

= {1}/{4}+ {1}/{8}= {2+1}/{8}= {3}/{8}

∴ Required time =

8/3

hours

= ( {8}/{3}×60 )

minutes

=160

minutes

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