The angle of elevation of the top tower from a point P on flat ground is 30°. If the tower is 100 metres tall, the distance between point P and the tower's foot is:
A. 149 m
B. 156 m
C. 173 m
D. 200 m
Answer:C
The angle of elevation of the top tower from a point P on flat ground is 30°. If the tower is 100 metres tall, the distance between point P and the tower's foot is:
A. 149 m B. 156 m C. 173 m D. 200 m
Explanation: Assume the tower is AB.APB = 30° and AB = 100 m, respectively.ROOT 3 AP = (AB x ROOT3) m = 100 ROOT 3 m = (100 x 1.73) m = 173 m AB/ AP = tan 30° = 1/ ROOT 3, AP = (AB x ROOT3) m = 100 ROOT 3 m = (100 x 1.73) m = 173 m