An aeroplane flying horizontally at a height of 2500 m above the ground is observed at an elevation of 60∘. If after 15 seconds, the angles of elevation is observed to be 30∘,find the speed of the aeroplane in km per hour.
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Q1
An aeroplane flying horizontally 1 km above the ground and going away from the observer is observed at an elevation of 60∘. After 10 seconds, its elevation is observed to be 30∘. find the uniform speed of the aeroplane in km per hour.
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Q2
An aeroplane flying horizontally 1 km above the ground is observed t an elevation of 60°. After 10 seconds, its elevation is observed to be 30°. Find the speed of the aeroplane in km/hr.