document.write( "Question 811795: a truck drives north at 60 mph, one-and-half hour later a car drives in the the same direction at 70 mph . for how many hours must the car drive for it to be 50 miles ahead of the truck. \n" ); document.write( "
Algebra.Com's Answer #488903 by richwmiller(17219)\"\" \"About 
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In the hour and a half the truck has traveled 90 miles.
\n" ); document.write( "You want to get 50 ahead of the truck
\n" ); document.write( "That is a total of 140 miles 90+50=140
\n" ); document.write( "Thhe car travels ten miles faster than the truck
\n" ); document.write( "140/10=14 hours to get 50 miles ahead of the truck\r
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