A car travels `30 km` at a uniform speed of ` 40 km//h` and the next `30 km` at a uniform speed of `20 km//h` . Find its average speed.

(a) A car travels first 30 km at a uniform speed of 20 km//h and next 30 km at a uniform speed of 40 km//h . What is its average speed ? (b) A scooter acquires a speed of 36 km//h in 10 s . What is its acceleration?

A train travels the first 15 km at a uniform speed of 30 km/h, the next 75 km at a uniform speed of 50 km/h, and the last 10 km at a uniform speed of 20 km/h. Calculate the average speed for the entire train journey.

A car travels first 30 km with a uniform speed of 60 km h^(-1) and then next 30 km with a uniform speed of 40 km h^(-1) . Calculate : (i) the total time of journey, (ii) the average speed of the car.

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

A motorcyclist drives from A to B with a uniform speed of 30 km h^(-1) and returns back with a speed of 20 kmh^(-1) . Find its average speed.

A motorcyclist drives from A to B with a uniform speed of 30 km h^(-1) and returns back with a speed of 20 kmh^(-1) . Find its average speed.

A partical moves in a straifgt line from A to B for the first 30 km with speed 10 km//h and the next 60 km with speed 20 km//h . Find the average speed and average velocity.

A motor cyclist drive from A to B with uniform speed of 30km/hour and returns back with a speed of 20 km/hour. Find the average speed.

A car moves 300 km at a speed of 45 km/h and then it increases its speed to 60 km/h to travel another 500 km. Find average speed of car.