document.write( "Question 717051: two circular cylinders have the same altitude. Find the ratio of their volumes if the radius of one cylinder is 5 times the diameter of the other. \n" ); document.write( "
Algebra.Com's Answer #440071 by KMST(5328)\"\" \"About 
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The volume of a cylinder is calculated as the surface area of its base times the height.
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\n" ); document.write( "CORRECTED CORRECTION:
\n" ); document.write( "This is what happens when you reach retirement age.
\n" ); document.write( "If the radius \"R\" of one cylinder is 5 times the diameter of the other,
\n" ); document.write( "Then \"R=5%2A%282r%29\" --> \"R=10r\"
\n" ); document.write( "and the ratio of volumes will be \"10%5E2=highlight%28100%29\"
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\n" ); document.write( "OOPS! It was not 2 times! My previous solution below is the answer to the problem in my head, as I (mis)remembered it, not the answer to the problem as written above.
\n" ); document.write( "The two cylinders have height \"h\" and radii \"r\" and \"2r\" (in the dictionary, the word radiuses is allowed as a plural, but spellchecker does not like it).
\n" ); document.write( "Their volumes will be
\n" ); document.write( "\"pi%2Ar%5E2%2Ah\" and \"pi%2A%282r%29%5E2%2Ah=pi%2A4r%5E2%2Ah\"
\n" ); document.write( "so the ratio of their volumes is
\n" ); document.write( "\"pi%2A4r%5E2%2Ah%2F%28pi%2Ar%5E2%2Ah%29=highlight%284%29\" or 4:1 if you prefer to express it that way.
\n" ); document.write( "The larger cylinder has a volume that is 4 times the volume of the smaller one.
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