document.write( "Question 828437: If a car leaves a city and drives 50 mph and two hours later a truck leaves the same city going the same way at 70 mph how long will it take the truck to catch the car \n" ); document.write( "
Algebra.Com's Answer #499328 by TimothyLamb(4379)\"\" \"About 
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\n" ); document.write( "s = d/t
\n" ); document.write( "t = d/s
\n" ); document.write( "d = t*s
\n" ); document.write( "---
\n" ); document.write( "head start:
\n" ); document.write( "d = 2*50
\n" ); document.write( "d = 100 miles
\n" ); document.write( "---
\n" ); document.write( "relative speed:
\n" ); document.write( "s = 70 - 50
\n" ); document.write( "s = 20 mph
\n" ); document.write( "---
\n" ); document.write( "time to over take:
\n" ); document.write( "t = 100/20
\n" ); document.write( "t = 5 hours
\n" ); document.write( "---
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