Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Prologue - Principles of Problem Solving - Look Back - Problems - Page P4: 7

Answer

You don't need anymore ribbon to raise it above or even below the equator.

Work Step by Step

The equator is one of the greatest circles of the earth, which are the circles passing the center of it and having the biggest circumference. So; you don't need more than the ribbon which tied around the equator equaling it's circumference to go above or below to the smaller circles.
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