Question

A ladder 15mm long just reaches the top of a vertical wall . If the ladder makes an 60deggre angle with the wall find the height of the wall

Answer 1

Step-by-step explanation:

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