# Rope around the world

• Apr 4th 2005, 08:59 AM
MathGuru
Rope around the world
Let's say you have a loop of rope around the equater. How much longer would the rope need to be in order to have the rope lifted of off the ground by 1 inch all the way around the world?

Another way to pose this question would be . . . If the radius of the earth increased by 1 inch how much longer would the rope need to be?
• Apr 5th 2005, 06:14 PM
Cooler
The answer is below, select text to see it.

It would have to be about 6.3" longer:

Length of rope = 2 * Pi * radius

2*Pi*(r+1")-2*Pi*r=2*Pi*1" = ~6.3"
• Apr 9th 2005, 05:18 AM
theprof
Quote:

Originally Posted by MathGuru
Let's say you have a loop of rope around the equater. How much longer would the rope need to be in order to have the rope lifted of off the ground by 1 inch all the way around the world?

Another way to pose this question would be . . . If the radius of the earth increased by 1 inch how much longer would the rope need to be?

Try again with something newer :)

bye