A can run 4 times as fast as B and gives B a start of 72 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 choices
A) 70 m B) 60 m C) 80 m D) 65 m E) 96 m
Speed of A:Speed of B=4:1   means in a race of 4m A gains 3m.   then in a race of 72m he gains 72*(4/3)   I.e 96m   ANSW96 mR:96 m
<result>E</result>
A can run 4 times as fast as B and gives B a start of 72 m. How long should the race course be so that A and B might reach in the same time?