Puzzles & Games Telephone poles-Solved

Discussion in 'Puzzles & Games' started by pineappleupsidedown, Oct 3, 2004.

I don't know how hard it will be for all of you here at ID to solve this one, but the forum i got this from was struggling with it.

Imagine two telephone poles. The two poles are both 25 feet high and the cable is 18 feet long. The lowest point the cable ever gets (due to slack) is 16 feet from the ground.

How far apart are the two poles?

---pineapple

[Edited on 10-3-2004 by pineappleupsidedown]

2. craizMember

my estimate is 9 feet apart. Theory being that there is 9 feet from the top of the pole to the bottom of the lowest point in the cable, and if the cable was stretched taught the poles would be 18 feet apart. My reasoning would be that for every foot you moved the poles closer to each other, the cable would lower a foot.

Do you actually know the answer to this?

I really hope you do

Yes, i know the answer. 9 feet is not correct.

---pineapple

is it 2 feet? that doesn't seem right but it's the only thing i can think of it would be easier, if it was half a circle cause then i could find the diameter lol

5. craizMember

ok, the poles are fully together, as half the cable length is 9 feet and there is 9 feet from the bottom of the cable to the top of the pole.

OOOOoooo , I used to be good at these . It is a sine wave problem I think , and PI is involved . Going to get out the pencil and paper right now .... Exercize those brain muscles !!!

11.45 feet ?