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The angle of elevation of an aeroplane ...

The angle of elevation of an aeroplane from a point on the ground is `60^(@)` .After 15 seconds flight ,the elevation changes to `30^(@)` .If the aeroplane is flying at a height of `1500sqrt(3)` m , find the speed of the plane

A

`230.63m.//sec`.

B

`230.93m . //sec`.

C

`235.85m.//sec`.

D

`236.25m.//sec`.

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Verified by Experts

The correct Answer is:
B
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