document.write( "Question 503049: Train A leaves a station traveling @ 20mph. 2 hrs later, Train B leaves the same station traveling @ 30mph in the same direction. how long does it take for train B to catch up with train A ? \n" ); document.write( "
Algebra.Com's Answer #339068 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
Train A = 20 mph
\n" ); document.write( "Train B = 30 mph
\n" ); document.write( "Train A starts 2 hours early
\n" ); document.write( "Train A will have covered 40 miles before Train B starts from station
\n" ); document.write( "catch up distance= 40 miles
\n" ); document.write( "catch up speed = 30 -20 mph
\n" ); document.write( "catch up speed = 10 mph
\n" ); document.write( "Catchup time = catchup distance/catch up speed
\n" ); document.write( "catch up time= 40 / 10
\n" ); document.write( "catch up time= 4 hours
\n" ); document.write( "
\n" ); document.write( "
\n" );