RRB Group D Model Paper 6 with solutions

Question : 54 of 99

Marks: +1, -0

P and Q together can complete a work in 10 days. P can complete the same work in 30 days. How many days will Q take to complete the same work?

Solution:

(4) P and Q 1 day work =

1/10

P's 1 day work =

1/30

Q's 1 day work
=

1/10-1/30

{3-1}/30=1/15

Time taken = 15 days

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