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3 men can do a piece of work in 18 days. 6 boys can also do the same work in 18 days. In how many days, 4 men and 4 boys together will finish the work ?
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- 10 days
- 6 days
- 12 days
- 9 days
Correct Option: D
3 men ≡ 6 boys
⇒ 1 man ≡ 2 boys
∴ 4 men + 4 boys ≡ 4 men + 2 men = 6 men
∵ 3 men can do a work in 18 days.
∴ 1 man can do a work in 18 x 3 days.
∴ Required number of days = (18 x 3)/6 = 9 days
