Question

The angle of elevation of a Jet plane from a point lying on the groue is 60'
After a flight of 15 seconds, the angle of elevation changes to 30 degrees. If the jet is flying
at a speed of 720 km/hr
find
the constant height
at which it is flying.​

Answer 1

Answer:

I think the answer is

$\sqrt{1500} km \: hr$

Answer 2

$\sqrt{500}$

I THINK THAT THE ANSWER IS THIS