# Man is Twice fast as Woman who is Twice fast as Boy

A man is twice as fast as a woman and a woman is twice as fast as a boy. If all of them i.e., a man, a woman and a boy can finish a work together in 4 days, in how many days will a boy do it alone?

- 28 days
- 7 days
- 21 days
- 14 days

**Answer: (1) 28 days**

Explanation:-

1 man = 2 women

1 woman = 2 boy

Then, 1 man = 2 x 2 boy = 4 boy

1 man, 1 woman and 1 boy can finish a work together = 4 days

4 boys, 2 boys and 1 boys can finish a work together = 4 days

Then, 7 boys can finish a work together = 4 days

Therefore, 1 boy can finish a work = 4 x 7 = 28 days

Hence, the answer is (1) 28 days.