Question

a ladder 25 metres long reaches a window of building 20 m above the ground determine the distance of the foot of the ladder from the building

Answer 1

Hi ,

Length of the ladder ( a ) = 25m

Height of the point the ladder

reaches above the window

( h ) = 20 m
Let Distance from foot of the ladder to

Building = x m

x ² + h² = a²

x² = a² - h²

= ( 25 )² - ( 20 )²

= ( 25 + 20 )( 25 - 20 )

= 45 × 5

x = √ ( 225 )

x = √ 15²

x = 15 m

I hope this helps you.

:)