A and B are two cities. A man travels from A to B at 35 km/ hr and returns at the rate of 15 km/hr. Find his average speed for the whole journey?
A20 km/hr
B21 km/hr
C22.5 km/hr
D22 km/hr
A20 km/hr
B21 km/hr
C22.5 km/hr
D22 km/hr
Related Questions:
Two trians X and Y start at the same time, X from station A to B and Y from B to A. After passing each other, X and Y take hours and hours, respectively, to reach their respective destinations. If the speed of X is 50 km/h, then what is the speed (in km/h) of Y?