document.write( "Question 233210: The amount of time it takes a swimmer to swim a race varies inversely as the average speed of the swimmer. A swimmer finishes a race in 400 seconds with an average speed of 3 feet per second. Find the average speed of the swimmer if it takes 300 seconds to finish the race. \r
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Algebra.Com's Answer #172133 by ankor@dixie-net.com(22740)\"\" \"About 
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The amount of time it takes a swimmer to swim a race varies inversely as the average speed of the swimmer.
\n" ); document.write( "A swimmer finishes a race in 400 seconds with an average speed of 3 feet per second.
\n" ); document.write( "Find the average speed of the swimmer if it takes 300 seconds to finish the race.
\n" ); document.write( ":
\n" ); document.write( "you can use an inverted ratio equation: let s = speed of the faster swimmer
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\n" ); document.write( "\"400%2F300\" = \"s%2F3\"
\n" ); document.write( "which is
\n" ); document.write( "\"4%2F3\" = \"s%2F3\"
\n" ); document.write( "cross mult
\n" ); document.write( "3s = 4*3
\n" ); document.write( "3s = 12
\n" ); document.write( "s = \"12%2F3\"
\n" ); document.write( "s = 4 ft/sec is the faster swimmers speed
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\n" ); document.write( "Prove that to yourself.
\n" ); document.write( "the dist for both should be the same:
\n" ); document.write( "400 * 3 = 1200 ft
\n" ); document.write( "300 * 4 = 1200 ft
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