document.write( "Question 1031233: An old water pipe is to be replaced by a new one so that twice as much water can flow through the pipe. What is the ratio of the radius of the new pipe to that of the old pipe?
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Algebra.Com's Answer #645987 by ankor@dixie-net.com(22740)\"\" \"About 
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An old water pipe is to be replaced by a new one so that twice as much water can flow through the pipe.
\n" ); document.write( " What is the ratio of the radius of the new pipe to that of the old pipe?
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\n" ); document.write( "To make twice as much water flow thru the pipe, the cross section area has to be doubled
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\n" ); document.write( "Let R = the radius of the larger pipe
\n" ); document.write( "Let r = the radius of the smaller
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\n" ); document.write( "\"%28pi%2AR%5E2%29%2F%28pi%2Ar%5E2%29\" = \"2%2F1\"
\n" ); document.write( "Cancel pi
\n" ); document.write( "\"%28R%5E2%29%2F%28r%5E2%29\" = \"2%2F1\"
\n" ); document.write( "\"R%2Fr\" = \"sqrt%282%2F1%29\"
\n" ); document.write( "\"R%2Fr\" = \"1.414%2F1\" is the ratio of radius the new pipe to the radius of the old pipe
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