An aeroplane flying horizontally at a height of 3 km. above the ground – McqOptions

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1.	An aeroplane flying horizontally at a height of 3 km. above the ground is observed at a certain point on earth to subtend an angle of 60 . After 15 seconds of flight, its angle of elevation is changed to 30 . The speed of the aeroplane (Take,
A.	230.63 m./sec.
B.	230.93 m./sec.
C.	235.85 m./sec.
D.	236.25 m./sec.
Answer» C. 235.85 m./sec.

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