A ladder 6m long leans against a vertical wall at an angle 53° to the...
MATHEMATICS
WAEC 2022
A ladder 6m long leans against a vertical wall at an angle 53° to the horizontal. How high up the wall does the ladder reach?
- A. 3.611m
- B. 4.521m
- C. 4.792m
- D. 3.962m
Correct Answer: A. 3.611m
Explanation
Cos θ = \(\frac{adj}{hyp}\) → \(\frac{x}{6}\)
cross multiply:
Cos 53º * 6 = x
0.6018 * 6
3.611m
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