Question

6 men's or 12 women's or 18 children's can do a work in 30 days.If they all work together in how many days they will finish the work.​

Answer 1

Answer:

the work is already done

Step-by-step explanation:

so they no need to do the work again

Answer 2

Answer:

They will finish the work in 10 days.

Step-by-step explanation:

Given,6 men's or 12 women's or 18 children's can do a work in 30 days.

So,6 men can do 1 work in 30 days.

By Unitary method,6 men can do $\frac{1}{30}$

work in 1 day .

And 12 women can do 1 work in 30 days.

By Unitary method,12 women can do $\frac{1}{30}$ work in 1 day.

Again 18 children can do 1 work in 30 days.

By Unitary method,18 children can do $\frac{1}{30}$ work in 1 day.

Therefore in 1 day they all together can do work

$( \frac{1}{30} + \frac{1}{30} + \frac{1}{30} ) \\ = \frac{1 + 1 + 1}{30} \\ = \frac{3}{30} \\ = \frac{1}{10}$

So,they can complete $\frac{1}{10}$ work in 1 day.

By Unitary method,they can complete 1 work in $\frac{1}{ \frac{1}{10} } = 10 \: days$

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