Question

A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B and C, as shown below:

What is the distance between the walls?

110.90 m
149.28 m
103.92 m
173.20 m

Answer 1

@Nurali

Answer 2

40cot(30)+60cot(60)=60√3=103.923

Answer 3

Thanks dude!!