document.write( "Question 255571: a car leaves a train station traveling west at a speed of 40 kilometers per hour. a train leaves the station three hours later traveling west at a rate of 120 kilometers per hour. in how many hours will the train catch up to the car? \n" ); document.write( "
Algebra.Com's Answer #187797 by palanisamy(496)\"\" \"About 
You can put this solution on YOUR website!
Let the time taken by tne train to meet the car be t hours
\n" ); document.write( "The speed of the train = 120 kmph
\n" ); document.write( "The distance travelled by the train in t hours = 120t
\n" ); document.write( "The time taken by tne car to meet the train is (t+3) hours
\n" ); document.write( "The speed of the train = 40 kmph
\n" ); document.write( "The distance travelled by the car in (t+3) hours = 40(t+3)
\n" ); document.write( "When they meet both distances are equal
\n" ); document.write( " 120t = 40(t+3)
\n" ); document.write( " 120t = 40t+120
\n" ); document.write( " 120t-40t = 120
\n" ); document.write( " 80t = 120
\n" ); document.write( " t = 120/80
\n" ); document.write( " t = 1h 30 m
\n" ); document.write( "
\n" ); document.write( "
\n" );