Question

the angle of elevation of an aeroplane from a point on the ground is 45 degree after applying for 15 second elevation changes to 30 degree if the aeroplane is flying at a height of 2500 find the speed of the aeroplane.​

Answer 1

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Answer 2

After 15 seconds angle of elevation is the change to 30°. Let DE be the height of aeroplane which is 3000 meters above the ground. Here we have to find speed of aero plane. So we use trigonometric ratios.

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