Question

A
1
14 T
1 If a ladder 20 m long is placed against a vertical
wall of height 10m, then the distance between the
foot of the ladder and the wall, the inclination of
the ladder with horizontal are respectively.
1. 10-3 m, 30°
2.5-3m. 30°
3. 20-3 m, 30
4.203m, 45°​

Answer 1

Answer:

1. 10√3 , 30°

Step-by-step explanation:

AB = height of wall = 10 m

AC =ladder = 20 m

BC = distance between the  foot of the ladder and the wall

= $\sqrt{20^2-10^2}$

= $\sqrt{300}$

= 10√3

Again,  the inclination of  the ladder with horizontal = ∠ACB

= sin⁻¹ (10/20)

= sin⁻¹ (1/2)

= 30°