An air plane is flying with velocity 50km/h in north east direction . Wind is blowing at 25km/hr from north to south .what is the resultant displacement of air plane in 2 hours.

An Airforce plane is ascending vertically at the rate of 100 km/h. If the radius of the Earth is r km, then how fast is the area of the Earth visible from the plane increasing at 3 min after it started ascending ? Given that the visible area A at height h is given by A = 2pi r^(2) (h)/(r + h) .

A body travels 50km east , then 120 km north and finally it comes back to the starting point through the shortest distance. Total time of journey is 3 hours. What is the average velocity in km/h , over the entire trip