Question

Angle of elevation of a point of aeroplane from a point on the ground is 60 degree after a flight 30 seconds the angle of elevation becomes 30 degree if the aeroplane is flying at a constant Hai writter 3000✓3 find the speed of aeroplane

Answer 1

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In triangle ABC,

tan60=BC/AB=3600*3(1/2)

AB=BC/tan60=3600*3^(1/2)/3^(1/2)

AB=3600

In triangle ADE,

tan30= DE/AD

AD=DE/tan30=3600*3^(1/2)/(1/3^(1/2))

AD=3600*3

AD=10800

The distance traveled by the jet plane=AD-AB=10800-3600=7200

So, the speed of the jet plane=7200/30=240

Therefore, the speed of the jet plane is 240 m/s.

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Answer 2

Step-by-step explanation:

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