A car travels first half distance between two places with a speed of 60 `kmh^(-1)`. What should be its speed for rest half of the distance so that its average speed becomes `90 kmh ^(-1)`?

A car travels first half distance between two places with a speed of 40 km/h and the rest of the half distance with a speed of 60 km/h. The average speed of the car is

A car travels first half distance between two places with a speed of 40 km/h and the rest half distance with a speed of 60 km/h. The average speed of the car will be-

A car travels the first half of a distance between two places a speed of 30 km/hr and the second half of the distance a 50 km/hr. The average speed of the car for the whole journey is

A car travels the first half of a distance between two places a speed of 30 km/hr and the second half of the distance a 50 km/hr.The average speed of the car for the whole journey is

A car travels the first half of a distance between two places at a speed of 30 km// hr and the second half of the distance at 50 km//hr . The average speed of the car for the whole journey is

A car travels the first half of a distance between two places a speed of 30 km/hr and the second half of the distance a 50 km/hr. The average speed of the car for the whole journey is