Question

A ladder is 17m long . It reaches a window at a height b above the ground .If the foot of ladder is at a distances 8m from the wall .Find the height of the window?

Answer 1

H=17m

B=8m

P=?

By using Pythagoras theorem

17^2 = 8^2 + b^2

189=64+b^2

b^2=125

b=root125

Answer 2

height of window will be square root of (17^2 - 8^2)

= root of(289-64)

=root(225)

= 15

Hence height of window is 15 m

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