A can run 4 times as fast as B and gives B a start of 75 m. How long should the race course be so that A and B might reach in the same time?  Choose the correct option
A) 70 m
B) 60 m
C) 100 m
D) 65 m
E) 75 m
Speed of A:Speed of B=4:1   means in a race of 4m A gains 3m.   then in a race of 75m he gains 75*(4/3)   I.e 100m   ANSWER:100 m
<result>C</result>
A can run 4 times as fast as B and gives B a start of 75 m. How long should the race course be so that A and B might reach in the same time?