Multiple Choice Questions

Manas is twice as good as workman as Manu and together they finish a piece of work in 21 days In how...........

Quantitative Aptitude (RRB NTPC) Time and work

Manas is twice as good as workman as Manu and together they finish a piece of work in 21 days. In how many days will Manu alone finish the work?

Ratio of efficiency of Mans and

Manu=2:1

Together their efficiency=3

Together they finish work in 21 days,

So total work=21 x 3 =63

Time taken by Manu only to finish that

work=Total work/Efficiency of

Manu=63/1=63 days

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