Question

A ladder 12 m long rests against a wall. If it reaches the wall at a height of 63 m, then the angle
of elevation is​

Answer 1

Answer:

Distance between the wall and the foot of the ladder = 6 m

Step-by-step explanation:

Correct Question : A ladder 12 m long rests against a wall.if it reaches the wall at a height of 6√3 ,then what is the distance between the wall and the foot of the ladder?

Let,

AC be the ladder of length 12 m.

AB be the wall such that AB = 6√3 m

In ΔABC,

AC² = AB² + BC²  [Pythagoras theorem]

⇒ (12)² = (6√3)² + BC²

⇒ BC² = 144 − 108

⇒ BC² = 36

⇒ BC = 6 m

So,

Distance between the wall and the foot of the ladder = 6 m