Question 77

M is thrice as good as workman as N and together they finish a piece of work in 30 days. In how many days will M alone finish the work?

Solution

Let N's efficiency = 1unit/day

M's efficiency would be = 3units/day

In 1 day they can do 4units of work

In 30days then can do 30*4=120units of work

M alone finish the work in 120/3 days = 40days

So the answer is option B.

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