A motorist travels to a place 150 km away at an average speed of 50 km/hour and returns at 30 km...

A motorist travels to a place 150 km away at an average speed of 50 km/hr and returns at 30 km/hr. His average speed for the whole journey in km/hr is (a) 35 (b) 37 (c) 37.5 (d) 40

A motorist travels from A to B at a speed of 40 km//hr and returns at a speed of 60 km/hr. His average speed will be:

A car driver travels from the plains to a hill station, which are 200 km apart at an average speed of 40 km/h. In the return trip he covers the same distance at an average speed of 20 km/h. The average speed of the car over the entire distance of 400 km is

An automobile driver travels from a plain to a hil station 120 km away at an average speed of 30 km per hour. He then makes the return trip at an average speed 25 km per hour. He covers another 120 km on the plain at an average speed of 50 km per hour. His average speed (in km/hr) over the entire distance of 360 km will be

A car driver travels from the planes to a hill station . Which are 200 km apart at an average speed of 40 km/h . In the return trip he covers the same distance at an average speed of 20 km/h . The average speed of the car over the entire distance of 400 km is

A train travels first 300 km at an average rate of 30 km per hour and further travels the same distance at an average rate of 60 km per hour, then the average speed over the whole distance is

A car travels a distance AB at a speed of 40 km/hr and returns to A at a speed of 30 km/hr. What is the average speed for the whole journey?