An aeroplane leaves an airport and flies due north at a speed of 1000 kmph. At the same time, another aeroplane leaves the same airport and flies due west at a speed of 1200 kmph. How far apart will the two planes be after 1 `(1)/(2)` hour ?

An aeroplane flows towards the north from an airport at a speed of 1000km per hour.In the same time another aeroplane also flows towards the west at a speed of 1200 km per hour the same place. Then the distance between the aeroplanes after 1 (1)/(2) hours will be

An aeroplane travels 2000 km to the west. It then turns north and moves 2000 km more. Finally it follows the shortest path to return to its starting point. If the speed of the plane is 200 km. h^(-1) , find its average velocity for the total journey .

Two trains leave a railway station at the same time. The first train travels towards west and the second train towards north. The first train travels 5 km/hr faster than the second train. If after two hours they are 50 km. apart, find the average speed of each train.

A student starting from his house walks at a speed 2(1)/(2) km/hour and reaches his school 6 minutes late. Next day starting at the same time he increases his speed by 1 km/hour and reaches 6 minutes early . How far is the school from his house ?