while landing at an airport, a pilot made an angle of depression of 20° average speed of the plane was 200km/hr the plane reached the ground after 54 seconds find the height at which the plane the was when it stared landing (sin 20° = 0.342)
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The height = 200×54/3600= 3km.
HENCE height = 0.347 = h/3. = 10.41 km
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hope this will help u
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