document.write( "Question 331763: Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling 80 mph and train b is traveling 100 mph. Train A passes a station at 6:15 am. If train B passes the same station at 6:27 am, at what time will train B catch up to train A? \n" ); document.write( "
Algebra.Com's Answer #237813 by mathmandotcom(31)![]() ![]() ![]() You can put this solution on YOUR website! The solution to this problem lies in the equation d=rt \n" ); document.write( "d=distance; da=distance train a travels, db=distance train b travels \n" ); document.write( "r=rate; ra=80, rb=100 \n" ); document.write( "t=time; ta= time for train a, tb=time for train b \n" ); document.write( "--------------------------------------------------------------------- \n" ); document.write( "da=db so ta*ra=tb*rb train A has a head start by 12 minutes or 80*12/60=16m \n" ); document.write( "da=16+80t=100t=db \n" ); document.write( "16+80t=100t subtract 80t \n" ); document.write( "16=20t divide by 20 \n" ); document.write( "4/5=t in hours in minutes 4/5*60=48minutes; answer \n" ); document.write( " |