Multiple choice

A certain work can be finished by 2 men & 3 boys in 5 days whereas 3 men & 2 boys can do it in 4 days. Compare the ratio of the work done by a man with that of a boy.

  1. 4 : 1

  2. 2 : 7

  3. 8 : 3

  4. 7 : 2

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

(2 men + 3 boys can do a job in 5 days, so in one day-5 X (2 men + 3 boys) can do it in one day. Similarly, 4 X (3 men + 2 boys) can do it in one day. Therefore, 5 X (2 men + 3 boys) = 4 X (3 men + 2 boys)2 men = 7 boys. Hence, work ratio = 7 : 2)