Question

a ladder of 20 m long is kept inclined to reach a window of16 m height . how far the wall should the foot of the ladder rest​

Answer 1

$\huge{\bold{\underline{\underline{Question:-}}}}$

A ladder of 20 m long is kept inclined to reach a window of 16 m height . How far the wall should the foot of the ladder rest.

$\huge{\bold{\underline{\underline{Solution:-}}}}$

Height of ladder = 20m

Height at which the window is located = 16m

Now, since it is forming a right angled triangle,

Therefore,

20² = 16² + X²

400 = 256 + X²

400 - 256 = X²

144 = X²

X = √144

x = 12m

So the distance at which the ladder should be placed is 12m from the house.