Question 580508: 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?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! 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?
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I think if you can just divide 20m by 2pi, you get 3.183 m, plenty room to walk under
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Perhaps you are not convinced
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Find the circumference of the earth
C = 
C = 40,212.38597 km
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Add 20 meters which is .020 km
40212.38597 + .02 = 40212.40597
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Find the radius with the new circumference
 = 6400.003184
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Change the difference to meters
.003184 * 1000 = 3.184 meters
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