A 15m long ladder is placed against a wall in such a way 9m away from the wall. Up to what
height does the ladder reach the wall?
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Answer:
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Step-by-step explanation:
length of ladder =L=15m
distance from the wall =D=9m
height of the wall =H=??
Pythagoras equations L²=D²+H²
15²=9²+H²
225- 81=H²
144=H²
H=12
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