document.write( "Question 250201: The volume of a cylinder is approximately 800 cm3. If the cylinder is 16 cm tall what is its radius? \n" ); document.write( "

Algebra.Com's Answer #182168 by jsmallt9(3758) $\"\"$ $\"About$

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The volume of a cylinder is:
\n" ); document.write( " $\"V+=+pi%2Ar%5E2%2Ah\"$
\n" ); document.write( "We know the V and the h, we should be able to find r:
\n" ); document.write( " $\"800+=+pi%2Ar%5E2%2A%2816%29\"$
\n" ); document.write( "Divide both sides by $\"16pi\"$ :
\n" ); document.write( " $\"800%2F%2816pi%29+=+%28pi%2Ar%5E2%2A16%29%2F%2816pi%29\"$
\n" ); document.write( "which simplifies to:
\n" ); document.write( " $\"50%2Fpi+=+r%5E2\"$
\n" ); document.write( "Find the square root of each side. (Since r is a radius we will ignore the negative solution.)
\n" ); document.write( " $\"sqrt%2850%2Fpi%29+=+r\"$

\n" ); document.write( "This is an exact answer. If you need a decimal approximation then use your calculator on the left side. \n" ); document.write( "

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