document.write( "Question 192910: A car traveling at 80 kilmeters per hour is passed by a second car going in the same direction at a constant speed. After 30 seconds, the two cars are 500 meters apart. Find the speed of the second car. \n" ); document.write( "
Algebra.Com's Answer #144792 by RAY100(1637)![]() ![]() ![]() You can put this solution on YOUR website! for units lets use km, hr\r \n" ); document.write( "\n" ); document.write( "remember distance=velocity * time (60 miles=60 mph * 1 hr)\r \n" ); document.write( "\n" ); document.write( "distance given as 500 meters * 1 km/1000m = .5 km \n" ); document.write( "time given as 30 sec *1/60sec/min *1/60min/hr=.0083 hr \n" ); document.write( "Let x = speed of faster car \n" ); document.write( "d=vt \n" ); document.write( ".5=(x-80) * .0083 \n" ); document.write( "divide both sides by .0083, and then add 80 \n" ); document.write( ".5/.0083+80=x \n" ); document.write( "60.24 +80=x \n" ); document.write( "140.24 =x ANSWER \n" ); document.write( " |