8 men and 2 boys working together can do 4 times as much work as a man and a boy . working capacity of man and boy is in the ratio  Choose one.
A) 1 : 2	B) 1 : 3	C) 2 : 1	D) 2 : 3	E) none of these

Rationale: explanation : let 1 man 1 day work = x 1 boy 1 day work = y then 8 x + 2 y = 4 ( x + y ) = > 4 x = 2 y = > x / y = 2 / 4 = > x : y = 1 : 2 option a
Answer: A