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.
A
15.8 m
B
14.3 m
C
4.9 m
D
4.6 m
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Cos 72º = \(\frac{d}{15}\)
d = Cos 72 x 15 = 4.63 m ≈ 4.6m
Source: Myschool Past Questions Archive (Record #71801)