riddle please answer

Pee in the pipe. Ball will float. Take ball.

lol that could work but im not sure thats the answer.

Whim, your bladder doesn't have enough urine in it to fill that pipe. The average bladder can hold about two cups, I've heard. I'm not gonna do the math, but considering the dimensions of the pipe you'd probably die of dehydration before you could fill it.

I may not know metric too well, but I'm damn sure that I can fit my hand down a pipe with a 10 cm diameter. The ball is only 8 cm, so theres plenty of room to fit my fingers around it. The answer is simply to reach into the pipe and take the ball.

If the diameter of the ball is 8 cm, it's not a ping pong ball.

if the pencil is sharpened, can't you just stab the ball and take it out?

That would work, but what if its not sharpened? I guess you could use the paperclips to sharpen it, but that would take a while

simple unfold the two paper clips stab into pencil put the graphite in the tube using the mirror to see where the pingpong ball is seperate the rope at and end take paper clips out and attatch to the rope. drop down tube spit on rope where graphite is pull rope up after paperclips are solidified to the ball after yur spit dries pull out of tube.

or u could cheat blow into tube at a certain angle allowing the ball to float out of it

i doubt spit makes good glue...
besides, if the person licked a million envelopes prior to entering the room, they'd run low on spit...
so we had urine and spit.... how about blood? stab urself w/ a paperclip and fill the tube w/ blood and the ball will float out...but depends how much u want to get out

combine the clips, pencil and string to create a grappling hook, drop it down, pull the ball out with minimal effort.

the mirror is unnecessary.

Though the question was merely, "How do you get out?"

So I'll just say, through the door... duh.

Ya, but:

if it's not sharpened, thrust harder. it will go in eventually. but the answer to the riddle is simple......you're screwed.