A body moves with a unifrom speed of `10 km h^(-1)` for 2h. The average speed of the body is ______ km `h^(-1)`

A bus travel one third of the distance with a speed of 12 km h^(-1) and the remaining distance with a speed of 20 km h^(-1) . The average speed of the bus is __________ km h^(-1)

A body wlaks to his school at a distance of 6 km with constant speed of 2-5 km h^(-1) and walks bach with a constant speed of 4 km h^(-1)~ What is avetage speed for the round trip in km h^(-1) ?

A man goes from Mysore to Bangalore at a uniform speed of 40 km/h and comes back to Mysore at a uniform speed of 60 km/h. His average speed for the whole journey is (A) 48 km/h (B) 50 km/h (C) 54 km/h (D) 55 km/h

On a 80 km track, a train travels 40 km with a uniform speed of 30 km h^(-1) . How fast must the train travel the next 40 km h^(-1) as to have average speed 40 km h^(-1) for the entire trip?

Veckat went to his collage from his house on his car with a unifrom speed of 60 km h^(-1) and returns to his house with a different speed. If the average speed of the car, for whole journey is 50 km^(h-1) , then find the speed of his car when it travelled from college to house.