A ladder 15 m long leans against a vertical pole, making an angle of 72º with the horizontal. Calculate, correct to one decimal place, the distance between the foot of the ladder and the pole.
- 15.8 m
- 14.3 m
- 4.9 m
-
4.6 m
The correct answer is: D
Explanation
Cos 72º = \(\frac{d}{15}\)
d = Cos 72 x 15 = 4.63 m ≈ 4.6m