In a 500 m race, the ratio of the speeds of two contestants A and B is 3 : 4. A has a start of 140 m. Then, A wins by:
Choose one
A) 60 m	B) 20m	C) 43m	D) 20m	E) 23m
To reach the winning post A will have to cover a distance of (500 - 140)m, i.e., 360 m.   While A covers 3 m, B covers 4 m.   While A covers 360 m, B covers 4	x 360	m	= 480 m.   3   Thus, when A reaches the winning post, B covers 480 m and therefore remains 20 m behind.   A wins by 20 m.   Answer:	20m
<result>D</result>
In a 500 m race, the ratio of the speeds of two contestants A and B is 3 : 4. A has a start of 140 m. Then, A wins by: