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?

a. 110.90 m
b. 149.28 m
c. 103.92 m
d. 173.20 m

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?

a. 110.90 m
b. 149.28 m
c. 103.92 m
d. 173.20 m

anonymous · Answer

attachment

anonymous · Answer

@Directrix ?

directrix · Answer

I'm thinking right triangle trig. The 30-60-90 and 45-45-90 theorems may do the trick. Let me think.

directrix · Answer

@lowcard2   What is 60/√3   + 40√3 = ?

anonymous · Answer

173.3?

directrix · Answer

@lowcard2 That's not what I got. Look at the Wolf's calculation: http://www.wolframalpha.com/input/?i=60%2F%E2%88%9A3+%2B+40%E2%88%9A3+%3D+

anonymous · Answer

ohh so its 103.92 then?

directrix · Answer

That's what the Wolf and I got.