A man is twice as fast as a women and a woman is twice as fast as a boy in doing a work. If all of them, a man , a woman and a boy can finish the work in 7 days, a boy will do it alone ?
A. 49 days
B. 7 days
C. 6 days
D. 42 days
Answer: Option A
Solution(By Examveda Team)
| Man | : | Woman | : | Boy | |
| Efficiency | 4 | : | 2 | : | 1 |
Total work = Time × (Efficiency of man + woman + boy)
⇒ 7 days × (4 + 2 + 1) = 49 units
∴ Boy can do this work in = $$\frac{{49}}{1}$$ = 49 days
This Question Belongs to Arithmetic Ability >> Time And Work
Related Questions on Time and Work
A. 18 days
B. 24 days
C. 30 days
D. 40 days
Join The Discussion