SSC CGL Tier II 12 Jan 2017 Paper 1

Question : 16 of 100

Marks: +1, -0

A and B together can complete a piece of work in 12 days. They worked together for 5 days and then A alone finished the rest of the work in 14 days. A alone can complete the work in

24 days
22 days
20 days
18 days

Validate

Solution:

(1) ∵ (A + B)’s 1 day’s work

=1/12

∴ (A + B)’s 5 days’ work

= 5/12

Remaining work

= 1–5/12 =7/12

∵ A does

7/12

work in 14 days
∴ A will do 1 work in

={14× 12}/7

´ = 24 days

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