An aeroplane leaves an airport and flies due west at a speed of 2100 km/hr. At the same time, another aeroplane leaves the same place at airport and flies due south at a speed of 2000 km/hr. How far apart will be the two planes after 1 hour?

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

An aeroplane leaves an airport and flies due north at a speed of 1000 km per hour. At the same tune, another aeroplane leaves the same airport and flies due west at a speed of 1200 km per hour. |How far apart will be the two planes after 11/2

I went to Delhi at a speed of 200 km/hr but suddenly I returned to the same place at a speed of 600 km/hr. What is my average speed :

A train X starts from a place at a speed of 50 km/hr. After one hour, another train Y starts from the same place at a speed of 70 km/hr. After how much time will Y cross X?

The distance between two cities A and B is 520 km. One car starts from city A towards city B with the speed of 60 km/hr. At the same time, another car starts form city B towards city A with a speed of 70 km/hr. After how many hours they will cross each other?

An aeroplane flies along the four sides of a square at the speeds of 100,200,300 and 400km/hr .find the average speed of the plane around the field.

An aeroplane flies along the four sides of a square at the speeds of 200, 400, 600 and 800 km/h. Find the average speed of the plane around the field.