A runs $1 \frac{2}{3}$ times as fast as B. If A gives B a start of
80m, how far must the winning post be so that A and
B might reach it at the same time?
Mr. Kumar drives to work at an average speed of 48
Km/hr. The time taken to cover the first 60% of the
distance is 10 minutes more than the time taken to
cover the remaining distance. How far is his office?