Question Paper from: IBPS Clerk Prelims 2017

A can do a work in 24 days, B is 20% more efficient than A if C can do the work in 10 more days than B, find days taken by A and C together to complete the work.

$\frac{20}{3}$ days

$\frac{44}{3}$ days

$\frac{40}{3}$ days

6 days

None of these

Solution:

Chapter Name: Time and Work

A can do work in = 24 days

B is with 20% more efficiency, so B can do same work in = 20 days

C can do the same work in = 20 + 10 = 30 days

One day work of A and C

= $\frac{1}{24}$ + $\frac{1}{30}$

= 5 + $\frac{4}{120}$

= $\frac{9}{120}$

= $\frac{3}{40}$

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IBPS Clerk Prelims 2017

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