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. In what time can the son do it alone?

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. In what time can the son do it alone? ?

Created: 1 week ago | Updated: 1 week ago | Created By:

Imran Ahmed

6.5 days

7 days

7.5 days

8 days

0 1

Best Answer Explained in Below-:

Man completes total work in 5 days, he will do one fifth of work in day and along with son will do one third of work in day. So son alone can complete the work in 7.5 days as explained below Work done by man in a day : 1/5 Work done by man + son in a day : 1/3 Work done by son in a day : 1/3 - 1/5 = 2/15 Time take by son to complete work : 15/2 or 7.5 days ans: 7.5 days

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