Question

Q The angle of elevation of an aeroplane from a point on the ground is 60°after 12 seconds from the same point the angle of elevation of same plane changes to 30° . If the plane is flying horizontally at speed of 300√3 km/hr find the height which plane fly?

Answer 1

if the constant height was 300underroot3 then x = 300 and y = 600 and speed is to be calculated 200