Question

a ladder 20m long reaches a window of a building 15m. above the ground.find distance of the foot of the ladder from the building.

Answer 1

Answer:

Length of ladder = 20m

Height of window =15m

Let the distance of the foot of the ladder from the building be (x) m

By Pythagoras formula,

(20)^2 =(15)^2 + (x)^2

(x)^2 = (20)^2 -(15)^2

(x)^2 =400 - 225

x =√175

Or, x = 5√7

Or, x = 13.22876

Hence the distance of the foot of the ladder from the building is 5√7 or 13.22876.

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