The angle of elevation of a jet plane from a point A on the ground is 60%. After a flight of 30 seconds, the angle of elevation changes to 30°. If the jet plane is flying at a constant height of 3600√3 metres, find the speed of the jet plane.
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Answer:
∴, speed of the plane = 15/3000
=200m\s.
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Hence, the speed of jet plane is 864 km/hr.
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