## How do I do this math question?

Suppose a wire is stretched tightly around the Earth. (The radius of the Earth is approx. 6,400 km.) If the wire is cut, its circumference is increased by 20 meters, and the wire is placed back around the Earth so that the wire is the same distance from the Earth at every point, could you walk under the wire?

***Step by Step directions would be awesome***

Happy Easter! :]

September 1st, 2011 at 3:14 pm

idk how 2 do it but i believe yeah u could walk under it

September 1st, 2011 at 3:22 pm

Math is stupid

September 1st, 2011 at 3:34 pm

C = 2pi*r or pi*d

C of earth = 2pi * 6400

which is equal to the length of the band

add 20 metres makes the band = 2pi*6400+ 0.02 kms long

now find the radius of the circle that this new band will create

2pi*6400+.02 = 2pi*r

r = (2pi*6400+0.02)/(2pi)

now put it all through the calculator

6400.003183

from this subtract the radius of the earth

0.003183kms…………..change to metres……

3.183 metres

What science can there be more noble, more excellent, more useful for men, more admirably high and demonstrative, than this of the mathematics? Benjamin Franklin