Question

firefighter's ladder of length 13 m was kept at a distance of 5 m from a building to reach a window
on the building. At what height is the window from the ground?
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Answer 1

according to the question a triangle is formed by the ladder, building and the ground.

applying Pythagoras theorem,

( height of the window)²=( length of ladder)²-( distance between the base of the building and the base of the ladder)²

=(13)²-(5)²

=169-25=144

so, height of the window=√144

therefore, height of the window is 12 m

Please mark this as the brainliest

Answer 2

according to the question a triangle is formed by the ladder building and the ground applying Pythagoras theorem (height of the window )2=(length of the ladder) 2-(distance between the base of the building and the base of the ladder) 2

=(13×13)-(5×5)

=169-25= 144

so therefore the height of the window is equals to 144 square is nothing but 12 metre