If a rope could be wrapped around the earths surface at the


Question: If a rope could be wrapped around the Earth's surface at the equator, it would be approximately circular and about 40 million metres long. Suppose we wanted to extend the rope to make it 1 metre above the equator at every point. How many more metres of rope would be needed? (The circumference of a circle with radius r is 2π r.)

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Mathematics: If a rope could be wrapped around the earths surface at the
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