document.write( "Question 819580: Bus A is traveling 20 mph. Bus B is traveling same way at 30 mph but leaves 4 hrs later. How many hrs will it take to catch up? \n" ); document.write( "
Algebra.Com's Answer #493150 by richwmiller(17219)\"\" \"About 
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in those four hours bus a has gone 80 miles
\n" ); document.write( "Bus b is gaining by 10 miles an hour
\n" ); document.write( "it will take 8 hours to catch bus a.
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