document.write( "Question 263619: I need help with this one question that I've always had problems with these rate of time problem.
\n" ); document.write( "Okay, so a plane is going to Chicago at 400 Kilometers/hour, and when they come back they're going 500 kilometers/hour...if the trip took 9 hours, how many kilometers did the plane fly all together? Thanks in advance and I hope you can answer as soon as possible! \n" ); document.write( "
Algebra.Com's Answer #194284 by drk(1908)\"\" \"About 
You can put this solution on YOUR website!
This is an RTD problem. Here is a table based on the given information
\n" ); document.write( "planes . . . . . . . .rate . . . . . . . time . . . . . . . .distance
\n" ); document.write( "to chi. . . . . . . . .400. . . . . . . . .T . . . . . . . . . 400T
\n" ); document.write( "from chi . . . . . . 500 . . . . . . . . 9 - T. . . . . . . 4500 - 500T
\n" ); document.write( "totals. . . . . . . . . . . . . . . . . . . 9 . . . . . . . . . .
\n" ); document.write( "The distances must be equal, so we get
\n" ); document.write( " 400T = 4500 - 500T
\n" ); document.write( "add 500T to get
\n" ); document.write( " 900T = 4500
\n" ); document.write( "divide to get
\n" ); document.write( "T = 5
\n" ); document.write( "we now multiply 400*5 = 2000
\n" ); document.write( "it was a 2000 km trip\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "((((no offense to ur method of solving this but u forgot to add to get the total distance, 2000km is only half the distance for the round trip, total distance is 4000km for the whole trip. J.Barnum)))) \n" ); document.write( "
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