Jharkhand PSC Prelim Exam 2008 Solved Paper

Question : 91 of 100

Marks: +1, -0

Ram and Shyam takes 4 days to complete 60% of works. Then goes Ram and Shyam takes 8 days to complete the remaining work. If Ram does alone all the work, how long does it?

6 days
8 days
10 days
11 days

Validate

Solution:

(3)

∴

One day work of Ram and Shyam

=\;{1}/{4}(\;{60 w}/{100})=\;{3 w}/{20}

∴

After 4 days,
Work left

=w-\;{3 w}/{5}=\;{2 w}/{5}

Shyam one day work

=\;{1}/{8} × \;{2}/{5} w=\;{w}/{20}

∴

Ram one day work

=\;{2 w}/{20}=\;{w}/{10}

∴

Ram alone can do a work in 10 days.

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