Question

A 15 m long ladder reached a window 12 m high from the ground on placing it against a wall at a
distance a. Find the distance of the foot of the ladder from the wall.

Answer 1

hey mate
your answer is in the picture
hope it will help you

Answer 2

Answer:

$\huge{\boxed{\sf9m}}$

Step-by-step explanation:

It is given in the question that the length of the ladder is 15m

And height of the wall is 12m.

According to pythagoras theorem  

Height sq + base sq = hypotenuse sq

So,

Hypotenuse^2 = B^2 + height^2

= 15^2 = B^2 + 12^2

= 225 = 144 + B^2

= 225 – 144 = b^2

= 81 = B^2

= √81= B

= 9 = B