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 the correct option:
A) 20 m  B) 40 m  C) 60 m  D) 45 m  E) 55 m
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 20 m covers 360 m B covers (4/3*360)= 
<gadget id="calculator">(4/3*360)</gadget>
<output>480</output>
480 m   when 20 m reaches the winning post B covers 480 m and 20 m behind   20 mNSWER 20 m
<result>A</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: