An Aeroplan is flying horizontally at a height of 1.8 km above the ground. The angle of elevation of plane from point X is 60 and after 20 seconds, its angle of elevation from X becomes 30 , If point X is on ground, then what is the speed (in km / hr.) of Aeroplan?

An Aeroplan is flying horizontally at a height of 1.8 km above the gro

1.	An Aeroplan is flying horizontally at a height of 1.8 km above the ground. The angle of elevation of plane from point X is 60 and after 20 seconds, its angle of elevation from X becomes 30 , If point X is on ground, then what is the speed (in km / hr.) of Aeroplan?
A.	201 3
B.	305 3
C.	216 3
D.	105 3
Answer» D. 105 3

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An Aeroplan is flying horizontally at a height of 1.8 km above the ground. The angle of elevation of plane from point X is 60 and after 20 seconds, its angle of elevation from X becomes 30 , If point X is on ground, then what is the speed (in km / hr.) of Aeroplan?

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