A runs 1 [https://www.indiabix.com/_files/images/aptitude/1-div-2by3.gif] times as fast as B. If A gives B a start of 80 m, how far must the winning post be so that A and B might reach it at the same time?

Explanation

Ratio of the speeds of A and B=5/(3): 1=5 : 3. Thus, in race of 5 m, A gains 2 m over B. 2 m are gained by A in a race of 5 m. 80 m will be gained by A in race of 5/(2)=200 m. [https://www.indiabix.com/_files/images/aptitude/1-sym-tfr.gif] Winning post is 200 m away from the starting point.