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  • A man can do a piece of work in 5 days, but with the help...
Multiple choice

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 the same piece of work alone?

  1. 13/2 days

  2. 7 days

  3. 15/2 days

  4. 8 days

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Son's 1 days work ( 1/3 - 1/5 ) = 2/15 The son alone can do the work in  15/2 days.

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