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20 women can complete apiece of work in 7 day. If 8 more women are put on the job. In how many days will they complete the work?

4.5 days
5 days
5.5 days
4.5 days

Correct Answer: 5 days

Explanation:

Given, M₁ = 20 D₁ = 7, M₂ = 20 + 8 = 28
and D₂ = ?
Using formula, M₁D₁ = M₂D₂
⇒ 20 x 7 = 28 x D₂
∴ D₂ = (20 x 7)/28 = 5 days

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