the angle of elevation of a jet fighter from a point A on the ground is 60 degree .after a flight of 15 seconds , the angle of elevation changes to 30 degree . if the jet is flying the speed of 720km/h . find the height at which jet is flying ? [root3=1.732]

Hi!
The given information can be represented using a figure as:
 
 
In this figur P is the point of observation. The line DCP is the ground. A and B are positions of the jet flighter.
Let the height at which the jet is flying be h
∴ BD = AC = h

 
 
Thus, the jet is flying at a height of 2598 m aove the ground.
 
Hope! This will help you.
Cheers!

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 62262km

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 62.262km

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