Time and Work Practice Test 2 with solutions

Question : 16 of 40

Marks: +1, -0

Pinki, Preeti and Parul can do a piece of work
in 4, 6 and 12 days respectively. In how many
days can they finish the same work if they
work together?

2 days
4 days
3 days
2 $1/2$ days
1 $3/4$ days

Validate

Solution:

Work done by Pinki in one day =

1/4

Work done by Preeti in one day =

1/6

Work done by Parul in one day =

1/{12}

Work done by all of them in one day
=

1/4+ 1/6+1/{12}

{3+2+1}/{12}

6/{12}

= 1/2
So, together they will finish the work in 2 days.

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