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A ladder 15 m long leans against a vertical pole, making an angle of 72º with...

Mathematics
WAEC 2024

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
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Correct Answer: Option D
Explanation

Cos 72º = \(\frac{d}{15}\)

d = Cos 72 x 15 = 4.63 m ≈ 4.6m

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