A rectangular room is 6 m long. A mirror 0.35 m wide is hung on the wall horizontally at one end of the room. A person standing 0.5 m in front of the mirror can just see both ends of the back wall in the mirror. What is the length of the back wall.
I don't want the answer I just want to know how to get it. explain everything please!
3. The Attempt at a Solution [/b
Don't have a clue how to attempt it.