The angle of elevation of an aeroplane from a point A on the ground is – McqOptions

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1.	The angle of elevation of an aeroplane from a point A on the ground is 60 . After a straight flight of the plane for 30 seconds, the angle of elevation becomes 30 . If the palne flies at a constant height of 3600 3 metre, what is the speed of plane?
A.	864 kmph
B.	846 kmph
C.	684 kmph
D.	None of these
Answer» B. 846 kmph

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