Question

A 20m lond ladder is placed against a wall to reach a window 12 m high. Find the distance of the foot of ladder from the wall

Answer 1

Answer:

The distance between ladder and wall is 16 m.

Step-by-step explanation:

Since The angle between the the wall and ground is 90°. So, they are making a right angle.

Now, According to Pythagoras theorem

H² = P² + B²

Here, ladder is placed against wall. So, H = 20 m,

height of window is perpendical. So, P = 12 m,

and the distance between wall and ladder is B.

Therefore, H² = P² + B²

B² = H² - P²

B² = (20)² - (12)²

B² = 400 - 144

B² = 256

B = (256)½

B = 16 m