Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 1 - Measurement - Problems: 1a

Answer

${2*\pi*radius}$ $={2*3.142*6370}$ $=40029\approx 40000$ km

Work Step by Step

Since we know that 1 kilometer = 1000 m, Earth's radius = 6370000 m= 6370 kilometers The formula for the circumference is 2*$\pi$*radius, Therefore, $2*\pi*radius={2*3.142*6370}=40029\approx 40000$ km
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