Question

A ladder 30 m long rests against a wall. If the feet of the ladder is 15 cm away from the wall, then the angle

of elevation of top of ladder from its feet is​

Answer 1

Answer:

3π​.

Step-by-step explanation:

Let AC be the ladder and AB be the wall,

∴AC=20m

   BC=10m, distance of the fact of the ladder from the wall.

Let ′θ′ be the angle between the horizontal surface and fact of the wall.

In △ACB,

⇒cosθ=ACBC​=2010​=21​

⇒cosθ=21​

⇒cosθ=cos60°

⇒θ=60°=3π​

Hence, the answer is 3π​.

its 20m long ladder answer

Answer 2

1. Step-by-step explanation:

here is your problem's answer