Soln:
Q. The angle of elevation of an aeroplane from a point on the ground is 450. After 15 seconds of flight the angle of elevation changes to 300. If the aeroplane is flying horizontally at a height of 4000m in the same direction, find the speed of aeroplane.
Q. The angle of elevation of an aeroplane from a point on the ground is 450. After 15 seconds of flight the angle of elevation changes to 300. If the aeroplane is flying horizontally at a height of 4000m in the same direction, find the speed of aeroplane.
S.E.E. Solution
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