A runs 1 3/4 times as fast as B. If A gives B a start of 60 meters. How far must the winning post be in order that A and B reach it at the same time?
Answer: B
Ratio of races of A and B = 7 : 4
i.e., 3 metres are gained by A in a race of 7 metres
60 metres are gained by A in a race of 7/3 x 60 = 140 metres