Question

A ladder 5m lng leans against the warll so that it makes an angle of 60 with the horizontal ground . calculate how far the wll the ladder reaches

Answer 1

I don't even know

Answer 2

surely you have studied the special 30-60-90 triangle.
The sides are in the ratio 1:√3:2
So, in this triangle, the sides are 5/2 : 5√3/2 : 5