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Good question!

The earth is 6378 kilometers in radius and we want circumference.

Circumference = 2*pi*r

Circumference = 2*pi(6378 km)

= 40,074.16 km (1000 m/1 km)(100 cm/1 m)(1 inch/2.54 centimeters)

= 1.58 X 109 inches/7.5 inch pencils

= 2.11 X 108 pencils fitting around earth

============================(that's 211 million pencils! )

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10y ago
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Q: How many 7.5 inch pencils can fit around the earth?
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