RRB Group D Model Paper 3 with solutions

Question : 77 of 100

Marks: +1, -0

A can do a work in 10 days. A and B can do this work in 4 days. In how many days, will B be able to do the same work alone?

Solution:

(4) A’s one-day work =

1/10

A and B’s one-day work =

1/4

∴ B’s one-day work =

(1/4) – (1/10) = 3/20

So, number of days taken by B to complete the work alone =

20/3

days

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