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)\"\" \"About 
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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
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