Time and Work Practice Test 4 with solutions

Question : 8 of 40

Marks: +1, -0

A man can do a piece of work in 5 days, but with the help of his son, he can do it in 3 days. The time taken by the son to do it alone is:

Solution:

His son's 1 day's work =

1/3 - 1/5

2/{15}

Hence, the time taken by his son to do it alone is

{15}/2

7 1/2

days.

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