Question

If 9 men or 12 women can do a piece of work in 30 days, in how many days, can the work be done by 6 men and 12 women working together?​

Answer 1

9M = 12W ⇒6M=8W

Hence, 6M + 12W = 8W + 12W = 20 W. Since 12W can do a piece of work in 30 days, so 20W can do the same work in (12 × 30)/20 = 18 days.

Answer 2

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Step-by-step explanation:

9M = 12W

⇒6M=8W

Hence,

6M + 12W = 8W + 12W = 20 W.

Since

12W can do a piece of work in 30 days,

so

20W can do the same work in (12 × 30)/20 = 18 days.

18 days is right answer !

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