How large a piece of shrink-wrap would be required to cover the entire planet? If the wrap were increased in area by l.0m2 and stretched out all around, how high would it be above the surface? Why do you think the result is so different from the previous problem? (Working this out takes a lot of decimal places.)
The above problem regard tying string or gift-wrapping our planet, thought of as a sphere with radius 6500 km.