Civil Service Exam Reviewer · Measurement and Geometry · hard
A 10-m ladder leans against a wall with its foot 6 m from the wall. How high up the wall does it reach?
- 8 m
- 4 m
- 11.66 m
- 9 m
Answer
A. 8 m
Solution
h = √(10² − 6²) = √64 = 8 m.
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