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:
Select: A) 10 m B) 20 m C) 30 m D) 40 m E) 45 m
A - distance of  (500 - 140)= 
<gadget id="calculator"> (500 - 140)</gadget>
<output>360</output>
&gt;360 m   A cover 3 m , 20 m covers 4 m=&gt; 480 m   when A reaches the winning post 20 m covers 480 m and remains 20 m behind   = &gt; A wins by 20 m   ANSWER 20 m
<result>B</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: