WAEC - Mathematics (2024 - No. 22)
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
説明
Cos 72º = \(\frac{d}{15}\)
d = Cos 72 x 15 = 4.63 m ≈ 4.6m