document.write( "Question 170217: Trains A and B are travelling in the same direction on parallel tracks. train A is traveling at 40mph and train b is travelling at44mph. Train A passes a station at 9:10 pm and Train B passes the same station @9:40.
\n" ); document.write( "At what time will train b cath up with train? \n" ); document.write( "
Algebra.Com's Answer #125651 by nerdybill(7384)\"\" \"About 
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Let x = time (in hours) it takes for train B to catch up to train A
\n" ); document.write( "Because of the difference in time the two trains passes a station we have:
\n" ); document.write( "x + (1/2) = time train A traveled
\n" ); document.write( ".
\n" ); document.write( "We use the \"distance formula\"
\n" ); document.write( "d = rt
\n" ); document.write( "where
\n" ); document.write( "d is distance traveled
\n" ); document.write( "r is rate or speed
\n" ); document.write( "t is time
\n" ); document.write( ".
\n" ); document.write( "For train B to catch up:
\n" ); document.write( "\"distance traveled by train A\" = \"distance traveled by train B\"
\n" ); document.write( "40(x + (1/2)) = 44x
\n" ); document.write( "multiplying both sides by 2:
\n" ); document.write( "40(2x + 1) = 88x
\n" ); document.write( "80x + 40 = 88x
\n" ); document.write( "40 = 8x
\n" ); document.write( "5 hours = x
\n" ); document.write( ".
\n" ); document.write( "But wait, the problem wanted \"clock\" time:
\n" ); document.write( "9:40 PM + 5 hours = 2:40 AM \r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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