Question

An aircraft is flying at a constant height with a speed of 360 km / hr. From a point on the ground, the angle of elevation at an instant was observed to be 45 degree. After 20 sec. , the angle of elevation was observed to be 30 degree. Determine the height at which the aircraft is flying, ( root 3 + 1 ) km or 2.732 km.

Answer 1

See the attached file for solution.

Note:
√3 + 1 = 2.732

Answer 2

Answer:

√3+1= 2.732

Step-by-step explanation:

in the attachment