# Distance of the foot of the ladder from the building

A ladder 25m long reaches a window of a building 20m above the ground. Determine the distance of the foot of the ladder from the building.

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A ladder 25m long reaches a window of a building 20m above the ground. Determine the distance of the foot of the ladder from the building.

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Theta= sin -1(20/25)=sin -1(4/5)=53

distance = 20/tan (theta)

= 20 / tan 53

=20/ (4/3)

=5*3

=15

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