A 15 metre long ladder is rested against a wall such that the foot of the ladder is 12 meter away from the wall. How up on the upper and and of the ladder ?
(a) 6m (b)8m
(c)9m (c)10m
STEP BY STEP EXPLANATION PLEASE
If your answer comes 9m it is correct.
I only need explaination.
Answers
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Answer:
9m
Step-by-step explanation:
Using phytogarus rule
15^2=12^2+x
225-144=x^2
81=x^2
x=9
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