Question

A ladder 15 m long leans against a wall making an angle of 60°with the wall. Find the height of the point where the ladder touches the wall.

Answer 1

Answer:

use Trignometry

tan 60° = H/15

root 3 = H/15

H = 45

Answer 2

Answer:

Let the length of the ladder be =15m(hypotenuse)

The angle between the ladder and the wall ∠BCA=60

∘

Angle between ladder and the ground ∠CAB=90

∘

−60

∘

=30

∘

Height of the wall =BC

sin30

∘

=

15

BC

⇒

2

1

=

15

BC

⇒BC=

2

15

=7.5m