Question

If 9 men can do a work in 18 days how many days would 3 men require to complete the same work, if they're working for double the time

Answer 1

Let the no. of days required by 3 men to complete the work be x

Days No. of men

18 9

x 3

Since, it is a case of inverse variation,

x ÷ 18 = 9 ÷ 3

x ÷ 18 = 3

x = 18 × 3

x = 54

Therefore, 3 men will require 54 days to complete the work.