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)\"\" \"About 
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( "\"20%2F60\" * 60 = 20 miles (from the marker)
\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 = \"20%2F15\"
\n" ); document.write( "t = = 1\"1%2F3\" hrs
\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 = \"20%2F15\" = 1\"1%2F3\" hrs
\n" ); document.write( "
\n" );