16 men or 24 boys can finish a piece of work in 35 days. How many boys are required in place of 18 men to complete the same work?
Answer & explanation
Correct answer: option 2
16M or 24B can complete a work in 35 days i.e. same amount of work is done by 16M as done by 24B in same number of days .
so ratio of efficiency M : B
3 : 2
that means 2M = 3B
18M = 9 × 3B = 27B
so 27 boys can do same work as done by 18 men