RRB Group D 3-Dec-2018 Shift 3 Solved Paper

Question : 27 of 100

Marks: +1, -0

Arun and Amit can do a piece of work in 9 days and 12 days respectively. If they work for alternate days and Amit starts the work first, then in how many days 35/36 parts of whole work will be completed?

10 days
12 days
5 days
8 days

Validate

Solution:

Work done by Arun and Amit in two days when they work alternately starting with Arun

=1/9+1/{12}={4+3}/{36}=7/{36}

Work done by them in 10 days, when they works in same ways

={10}/2×7/{36}={35}/{36}

works.

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