Civil Service Exam Reviewer · Measurement and Geometry · hard
A 15-m ladder leans against a wall with its foot 9 m from the wall. How high up the wall does it reach?
- 6 m
- 12 m
- 17.49 m
- 13 m
Answer
B. 12 m
Solution
h = √(15² − 9²) = √144 = 12 m.
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