From airport two aeroplanes start at the same time . If the speed of first aeroplane due North is 500 km/h and that of other due East is 650 km/h , then find the distance between two aeroplanes after 2 hours .

The distance between two stations is 340 km. Two trains start simultaneously from these stations on parallel tracks to cross each other. The speed of one of them is greater than that of the other by 5 km/hr. If the distance between the two trains after 2 hours of their start is 30 km, find the speed of each train.

The distance between two stations is 230km . Two scooterists start simultaneously towards each other one from A and other from B If the speed of one scooterist is 10km less than that of the other,then find the speed of each scooterist if the distance between them after 3 hours of their start is 20km.

Two aeroplanes start from the same place in opposite directions one goes towards east at 320 km/h and the other goes towards west at 400 km/h what time will they take to be 720 km apart?

Two aeroplanes start from the same place in opposite directions. One goes towards east at 320 km/h and the other goes towards west at 400 km/h what time will they take to be 720 km apart?

An aeroplane when 3500m high passes vertically above another aeroplane at an instant when the angles of elevation of the two aeroplanes from the same point on the ground are 45 and 30 respectively.Find the vertical distance 35. between the two aeroplanes.

A plane is to fly due north. The speed of the plane relative to the air is 200 km//h , and the wind is blowing from west to east at 90 km//h .