A can run 4 times as fast as B and gives B a start of 69 m. How long should the race course be so that A and B might reach in the same time?  Choose the correct choice from the following:
A) 70 m
B) 60 m
C) 80 m
D) 65 m
E) 92 m
Speed of A:Speed of B=4:1   means in a race of 4m A gains 3m.   then in a race of 69m he gains 69*(4/3)   I.e 92m   ANSW92 mR:92 m
<result>E</result>
A can run 4 times as fast as B and gives B a start of 69 m. How long should the race course be so that A and B might reach in the same time?