The angle of elevation of the top of a tower is 30°. If the height of the tower is doubled, then the angle of elevation of its top will be
A. Greater than 60°
B. Equal to 30°
C. Less than 60°
D. Equal to 60°
Answer:C
The angle of elevation of the top of a tower is 30°. If the height of the tower is doubled, then the angle of elevation of its top will be
A. Greater than 60° B. Equal to 30° C. Less than 60° D. Equal to 60°
Explanation: Let AB = h be the height and BC = x.