RRB Group D Model Paper 8 with solutions

Question : 21 of 100

Marks: +1, -0

A can do a piece of work in 25 days and B can do the same work in 30 days. If they work together for 5 days, how much work is left?

Solution:

(3)
A's 1 day's work =

1/25

B's 1 day's work =

1/30

So, (A + B)’s 5 days’ work
= 5

(1/25+1/30)

{11×5}/150=11/30

Remaining work will be
= 1 -

11/30=19/30

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