SOLUTION: a 5m long ladder is placed against wall its foot 1.8m from the wall .find how far up the wall the ladder reaches

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Question 459617: a 5m long ladder is placed against wall its foot 1.8m from the wall .find how far up the wall the ladder reaches
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
Ladder length= 5m
Distance from wall= 1.8m
Height ladder reaches on wall x m

By Pythagoras theorem
Hypotenuse^2 = Leg1^2+leg2^2
5^2-1.8^2=x^2
25-3.24 =x^2
21.76=x^2
+sqrt%28x%5E2%29=sqrt%2821.76%09%29
x= 4.66 m