Question

An aeroplane flying horizontally at a height of .1.5 km above the ground is observed at a certain point on earth to subtend and angle of 600. After 15 seconds, its angle of elevation at the same point is observed to be 300. Calculate the speed of the aeroplane in km/hr.an aeroplane flying horizontally at a height of 2500 m above the ground is observed at an angle of elevation of 60 degree if after 15 seconds the angle of elevation is observed to be 30 degrees find the speed of the aeroplane in kilometre per hour

Answer 1

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