document.write( "Question 98623: Assuming that a planet is a perfect sphere with a circumference of 20771 km and an average density of 2.41 g/mL, what is its approximate mass? \n" ); document.write( "
Algebra.Com's Answer #71761 by Nate(3500)\"\" \"About 
You can put this solution on YOUR website!
The circular circumference of the sphere is ~> 2\"pi\"r
\n" ); document.write( "2\"pi\"r = 20771
\n" ); document.write( "r is approx. 3,305.81 km
\n" ); document.write( "Sphere Volume is ~> (4/3)\"pi\"r^3
\n" ); document.write( "(4/3)\"pi\"r^3
\n" ); document.write( "Volume is approx. 1.51 x 10^11 km^3 or approx. 1.51 x 10^26 mL
\n" ); document.write( "Density*Volume = Mass
\n" ); document.write( "3.647021 x 10^26 grams
\n" ); document.write( "
\n" );