document.write( "Question 489687: a train leaves at noon with constant velocity of 40 mi/hr another train leaves at 2pm with constant velocity of 70 mi/hr at what mile do they catch up? \n" ); document.write( "
Algebra.Com's Answer #333732 by mananth(16946)\"\" \"About 
You can put this solution on YOUR website!
Time difference = 2hours\r
\n" ); document.write( "\n" ); document.write( "catch up speed = 70-40=30 mph\r
\n" ); document.write( "\n" ); document.write( "distance at which they catch up = 30*2 = 60 miles
\n" ); document.write( "
\n" );