document.write( "Question 149591: Car A and car B are traveling in the same direction. Car A is traveling at a constant velocity of 60 mph and car B is traveling at a constant velocity of 75mph. If car A reaches mile marker M 20 minutes before car B, how much time will elapse between the time that car B reaches mile marker M and the time that car B reaces car A? \n" ); document.write( "
Algebra.Com's Answer #109801 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Car A and car B are traveling in the same direction. Car A is traveling at a constant velocity of 60 mph and car B is traveling at a constant velocity of 75mph. If car A reaches mile marker M 20 minutes before car B, how much time will elapse between the time that car B reaches mile marker M and the time that car B reaches car A? \n" ); document.write( ": \n" ); document.write( "During the 20 min that elapses for car B to get to the marker, car A will have traveled: \n" ); document.write( " \n" ); document.write( ": \n" ); document.write( "Let t = time for the car B to catch car A \n" ); document.write( ": \n" ); document.write( "Write a distance equation Distance = speed * time \n" ); document.write( ": \n" ); document.write( "Car B distance = Car A distance + 20 miles \n" ); document.write( "75t = 60t + 20 \n" ); document.write( "75t - 60t = 20 \n" ); document.write( "15t = 20 \n" ); document.write( "t = \n" ); document.write( "t = = 1 \n" ); document.write( ": \n" ); document.write( "Another easy way: \n" ); document.write( "Using relative speed. 75 - 60 = 15 mph \n" ); document.write( "Assume that Car A is stationary and car B is traveling at 15 mph \n" ); document.write( ": \n" ); document.write( "How long will it take Car B to travel 20 mi at 15 mph? \n" ); document.write( "time = |