Posted by **Debra** on Wednesday, October 26, 2011 at 4:29am.

if the radius of a metal hoop that surrounds a silo were to expand by 1.00 m, the circumference of the hoop would increase by 6.28 m. If a metal hoop that completely surrounds the earth were to thermally expand so that its radius increased by 1.00m , by how much would its circumference increase?

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