document.write( "Question 1022431: Luis can drive 3 times as fast as Rico can ride his bicycle. If it takes Rico 4 hours longer than Luis to travel 72 miles, how fast can Rico ride his bicycle? \n" ); document.write( "

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\n" ); document.write( "Luis can drive 3 times as fast as Rico can ride his bicycle. If it takes Rico 4 hours longer than Luis to travel 72 miles, how fast can Rico ride his bicycle?
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Let Rico's speed be S
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document.write( "Then Luis' is: 3S
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document.write( "We then get:  
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document.write( " ------- Multiplying by LCD, 3S
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document.write( "144 = 12S
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document.write( "S, or Rico's speed = , or  \n" );
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