A ladder 10 m long reaches a window 8 m above the ground. How far is the foot of the ladder from the base of the wall?
A5 m
B6 m
C7 m
D8 m
Explanation
Distance = Sqrt(10^2 – 8^2) = Sqrt(100 – 64) = Sqrt(36) = 6 m.
Exam Relevance
- Topic: Geometry & Mensuration
- Subtopic: Pythagoras Theorem
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