Question

A ladder 17 m long rests against a vertical wall. If the foot of the ladder is 15 m away from the wall and the ladder just reaches the top of the wall, how high is the wall?

Answer 1

Answer:

Pythagoras Theorem - Formula

(Perpendicular)2 =(Hypotenuse)2 -(base)2

x^2= (17^2-15^2)

x^2= (289-225)

x^2= 64

x =√64

x =8