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

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

An automobile driver travels from plane to a hill station, a distance of 120 km at an average speed of 30 km per hour. He then makes the return trip at an average speed of 25 km per hour. He covers another 120 km distance on plane at an average speed of 50 km per hour. His average speed over the entire distance of 360 km will be :

An automobile driver travels from plane to a hill station, a distance of 120 km at an average speed of 30 km per hour. He then makes the return trp at an average speed of 25 km per hour. He covers another 120 km distance on plane at an average speed of 50 km per hour. His average speed over the entire distance of 360 km will be :

An automobile driver travels from plane to hill station 100km distance at an average speedof 30km per hour.He then makes the return trip at average speed of 20km per hour.What is his average speed over the entire distance (200km)?

A car covers a distance in 40 minutes with an average speed of 60 km per hour. The average speed to cover the same distance in 30 minutes is

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

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