Time and Work Practice Test 2 with solutions

Question : 40 of 40

Marks: +1, -0

A man and a woman working alone can complete a work in 5 and 7 days respectively. In case they work together and take the help of a boy, then the same work can be completed in 2

1/3

days. Find the ratio of time taken by a man, the woman and the boy working alone?

15 : 21 : 35
5 : 7 : 3
7 : 6 : 3
10 : 14 : 21
None of the above

Validate

Solution:

Work done by a man in one day =

1/5

Work done by a woman in one day =

1/7

Work done by both of them in one day =

3/7

Work done by a boy in one day =

3/7 - 1/5 - 1/7

{15-7-5}/{35}

3/{35}

So, required ratio = 5 : 7 :

{35}/3

= 15 : 21 : 35

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