A can complete a piece of work in 10 days B is 25 more efficient than A How many days will B alone t...........

Quantitative Aptitude and Numerical Ability (DRDO) (Phase-i and II) Time and work

A can complete a piece of work in 10 days. B is 25% more efficient than A. How many days will B alone take to complete the same work?

7 days

8 days

6 days

9 days

Correct option:2

Solution:

Given that B is 25% more efficient than A

so the ratio of Efficiency A:B is 4:5

A can complete a piece of work in 10 days

So total work=Time taken by A x efficiency of A=>10 x 4=40

Time taken by B= Toatl work/efficiency of B=>40/5=8 days

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