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February 1, 2015

February 1, 2015

Posted by **Tweets** on Tuesday, August 23, 2011 at 5:50am.

- Math -
**Jai**, Tuesday, August 23, 2011 at 5:55amjust substitute the value of radius to the equation:

surface area = SA = 4*pi*r^2

SA = 4*3.14*(3960^2)

SA = 1.97 * 10^8 miles^2

hope this helps~ :)

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