ï»¿ An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10s apart is 30Â°, what is the speed of the aircraft? from Physics Motion in A Plane Class 11 Manipur Board

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An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10s apart is 30Â°, what is the speed of the aircraft?

The aircraft takes 10s to go from A to B and AB subtends an angle of 30Â° at O.

Height of the aircraft from the groun = 3400 m

In right angled triangle OAC,

AC = OC tan 15Â°

Â  Â  Â = 3400 x 0Â·2679

Â  Â  Â = 911m

âˆ´ Â Â

Now, the speed of aircraft is,

Â

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