document.write( "Question 524011: The rate of a passenger train exceeds the rate of a freight train by 20 mph. It takes the passenger train 1/2 as much time to travel 160 miles as it does the freight train. Find the rate of each train. \n" ); document.write( "
Algebra.Com's Answer #347519 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! The rate of a passenger train exceeds the rate of a freight train by 20 mph. It takes the passenger train 1/2 as much time to travel 160 miles as it does the freight train. Find the rate of each train. \n" ); document.write( "** \n" ); document.write( "let x=rate of speed of freight train \n" ); document.write( "x+20=rate of speed of passenger train \n" ); document.write( "Travel time=distance/rate of speed \n" ); document.write( ".. \n" ); document.write( "160/x=2(160/(x+20) \n" ); document.write( "160x+3200=320x \n" ); document.write( "160x=3200 \n" ); document.write( "x=3200/160=20 \n" ); document.write( "x+20=40 \n" ); document.write( "ans: \n" ); document.write( "rate of speed of freight train=20 mph \n" ); document.write( "rate of speed of passenger train=40 mph \n" ); document.write( " |