The length of the shadow of a vertical pole on the ground is 18 m. If the angle of elevation of the sun at that time is θ, such that \(\cos \theta = \frac {12}{13}\), then what is the height (in m) of the pole?

The length of the shadow of a vertical pole on the ground is 18 m. If

1.	The length of the shadow of a vertical pole on the ground is 18 m. If the angle of elevation of the sun at that time is θ, such that \(\cos \theta = \frac {12}{13}\), then what is the height (in m) of the pole?
A.	7.5
B.	9
C.	18
D.	12
Answer» B. 9