SSC CGL 10 Jun 2019 Shift 1 Paper

Question : 64 of 100

Marks: +1, -0

The ratio of the efficiencies of A, B and C, to do a certain work is 7 : 3 : 5. Working together, they can complete the work in 21 days. A and C worked together for 15 days. The remaining work will be completed by B alone in:

54 days
45 days
60 days
63 days

Validate

Solution:

Total work

=(7+3+5) \×21=315

units
Work done in 15 days

=(7+5) \×15

=12 \×15=180

units
Remaining work

=315-180=135

Days taken by

\ {B}

alone

=\ {135}/{3}=45

days

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