26 men can complete a piece of work in 17 days. How many more men must be hired to complete the work in 13 days?
34
8
18
6
12
Using man x days = fixed x = 26 × 17 = 13x ⇒ x = 34
∴ Required men = 34 – 26 = 8
Thirty men can complete a work in 36 days. In how many days can 18 men complete the same piece of work?