document.write( "Question 1109981: What is the surface area of a sphere if a hemisphere with the same radius had a surface area of 69π cm^2 \n" ); document.write( "

Algebra.Com's Answer #725004 by greenestamps(13215) $\"\"$ $\"About$

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\n" ); document.write( "The formula for the surface area of a sphere is
\n" ); document.write( " $\"4%28pi%29%28r%5E2%29\"$

\n" ); document.write( "On a hemisphere, the curved surface area is therefore $\"2%28pi%29%28r%5E2%29\"$ and the flat surface area is $\"%28pi%29r%5E2%29\"$ , so the total surface area is $\"3%28pi%29%28r%5E2%29\"$ .

\n" ); document.write( "So the surface area of the sphere is 4/3 the surface area of the hemisphere.

\n" ); document.write( " $\"%2869pi%29%2A%284%2F3%29+=+92pi\"$

\n" ); document.write( "The surface area of the sphere is 92pi cm^2. \n" ); document.write( "

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