Question

A ladder 15m long just reaches the top of a vertical wall.if the ladder makes an angle of 60 degree with the wall,then the height of the wall is​

Answer 1

Answer:

Step-by-step explanation:

Ladder = AC = 15m

Angle of elevation = 60

And hieght of wall = AB = ?

In this ∆ ABC, angle B = 90 and C=60

sin60 = AB / AC

√3 / 2 = AB / 15 ...........(sin60 = √3 / 2 ) 15√3 / 2 = AB

AB = 7.5√3

So, Height of wall = 7.5√3 m.