A man, a woman and a boy can do a piece of work in 6, 9 and 18 days respectively

Question

A man, a woman and a boy can do a piece of work in 6, 9 and 18 days respectively. How many boys must assist one man and one woman to do the work in 1 day ?

Options:

A . 5

B . 6

C . 9

D . 13

Answer: Option D

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