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The Earth is approximately a large sphere. The Earth has a radius of 6.378 x 103km...

The Earth is approximately a large sphere. The Earth has a radius of 6.378 x 103km and an equatorial circumference of 4.007 x 104 km. Imagine that you wrapped a belt snugly around the equator. It would have a length of 4.007 x 104 km. Now imagine that you wanted to add some material to the belt so that when it encircled the Earth it would be 2.0 m above the surface at every point

How much additional material would you have to add?

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Answer #1

We know the relationship between circumference of a circle and its radius

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