document.write( "Question 1084206: Another event at super challenge day is the lawn mower derby. Team members try to mow a standard sized lawn as quickly as possible. Terri and Candace can mow the lawn in 18min. If it takes Candace 30min to mow a lawn alone, how long does it take Terri to mow the lawn alone? \n" ); document.write( "
Algebra.Com's Answer #698283 by ikleyn(52834)\"\" \"About 
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document.write( "Since Terri and Candace can mow the lawn in 18 min, they mow \"1%2F18\" of the lawn area per minute working together.\r\n" );
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document.write( "Since Candace can mow the lawn in 30 min, he (or she ?) mows \"1%2F30\" of the lawn area per minute working alone.\r\n" );
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document.write( "Hence, Terri working alone can mow \"1%2F18-1%2F30\" = \"5%2F90-3%2F90\" = \"2%2F90\" = \"1%2F45\" of the lawn area per minute.\r\n" );
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document.write( "Thus it will take 45 minutes for Terri to complete the job working alone.\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved. 4 (four) lines to get the solution with mental calculations, without solving equations.\r
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\n" ); document.write( "It is a typical joint work problem.\r
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\n" ); document.write( "\n" ); document.write( "There is a wide variety of similar solved joint-work problems with detailed explanations in this site. See the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Using Fractions to solve word problems on joint work \r
\n" ); document.write( "\n" ); document.write( "    - Solving more complicated word problems on joint work \r
\n" ); document.write( "\n" ); document.write( "    - Selected joint-work word problems from the archive \r
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\n" ); document.write( "\n" ); document.write( "Read them and get be trained in solving joint-work problems.\r
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\n" ); document.write( "\n" ); document.write( "Also, you have this free of charge online textbook in ALGEBRA-I in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this textbook under the topic \"Rate of work and joint work problems\" of the section \"Word problems\".\r
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