If a rope was suspended One foot off the cicumferance of the earth,how long would it have to be.?

Answer 1

Circumference of radius r = 2*pi*r

Circumference of radius (r+1) = 2*pi*(r+1)

Difference = 2*pi*(r+1) - 2*pi*r = 2*pi*(r + 1 -r)

= 2*pi*1 feet ( = 6.28318531 feet) longer than the circumference of the earth.

Notice how the radius (r) is cancelled out and we don't need to know the exact circumference of the earth. In other words, it doesn't matter how big your circle is, it's the *increase* in radius that counts. If an athlete ran 1 foot outside the line round a circular track, he would also run just over 6 feet further than if he ran on the line.

Answer 2

Circumference of a circle is 2*Pi*r or Pi*d

The diameter of the rope suspended 1ft above the earth is 2ft larger than that of the earth’s diameter.

The math has been shown earlier but using the earth’s diameter to be 26000 miles. You rope will have to be 26000.001 miles or 4576002 feet long which has been correctly stated as just over 6 feet greater than the earth’s diameter.

Answer 3

The earth is 26,000 miles circumference at the equator, in feet, this is 26000*1760*3 ft. Divide by Pi, and the earth has a diameter of 43680000 ft. Add 1 ft, 43680001. Recalculate the circumference, 26000.0005miles

Answer 4

1)How long would it have to be to do what?
2)It can be any length as long as there is one foot of distance between the rope and the earth.
3)Circumference is spelled c-i-r-c-u-m-f-e-r-e-n-c-e
4)Is that the best idea you can think of when you are bored?
5)Don´t go hanging any ropes around.!!

Answer 5

Whilst the oceans can be regarded as at sea level, we cannot assume that the overland terrain is flat as a proverbial pancake and the rope would have to follow the contours of the mountains and valleys it came across, thereby adding to its length

Answer 6

1 foot

Answer 7

lets see now thats 2ft x pi + the circumference of the earth

Answer 8

131,476,895.7 ft = 40074.2 kM

Answer 9

really long :-)