An aeroplane flying horizontally at a height of 1.5km above the ground is observed at a certain point on earth to subtend an angle of 60. After 15 seconds, its angle of elevation at the same point is observed to be 30. Calculate the speed of the aeroplane in km/h.
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later after getting the answer just multiply it with 15
hope it helps!
hope it helps!
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15 seconds
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