document.write( "Question 1170583: Two cars travel towards each other from points 400 km apart. The two cars meet in 4 hours. What is the average speed of each car if one car travels 20 km per hour faster than the other? \n" ); document.write( "
Algebra.Com's Answer #795438 by ikleyn(52782)\"\" \"About 
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document.write( "Let the slower car rate be x km/h;\r\n" );
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document.write( "then the faster car rate is  (x+20) km/h.\r\n" );
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document.write( "The total distance equation is\r\n" );
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document.write( "    4x + 4*(x+20) = 400  kilometers.\r\n" );
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document.write( "Simplify and find x\r\n" );
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document.write( "    4x + 4x + 80 = 400\r\n" );
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document.write( "    8x           = 400 - 80 fa\r\n" );
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document.write( "    8x           = 320\r\n" );
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document.write( "     x           = 320/8 = 40.\r\n" );
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document.write( "ANSWER.  The slower car rate is  40 km/h;  the faster car rate is 40+20 = 60 km/h.\r\n" );
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\n" ); document.write( "\n" ); document.write( "For simple Travel & Distance problems,  see introductory lessons \r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems \r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems for two bodies moving in opposite directions \r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems for two bodies moving in the same direction (catching up)\r
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\n" ); document.write( "\n" ); document.write( "You will find the solutions of many similar problems there.\r
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\n" ); document.write( "\n" ); document.write( "Read them and learn once and for all from these lessons on how to solve simple Travel and Distance problems.\r
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