An aeroplane when flying at a height of 3125 m from the ground passes vertically below another plane...........

Quantitative Aptitude ( CCS) Height and Distance

An aeroplane when flying at a height of 3125 m from the ground passes vertically below another plane at an instant when the angle of elevation of the two planes from the same point on the ground are 30° and 60° respectively. The distance between the two planes at that instant is

6520 m

6000 m

5000 m

6250 m

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Explanation:

Given, the height of an aeroplane from the ground, BD = 3125 m
Let, the distance between the aeroplanes, AD = x metre
And, BC = y metre
∴ AB = AD + BD = (3125 + x) m
In ΔBCD,