document.write( "Question 479902: Robert left on a trip, traveling at 45 mi/h. One- half hour later, Laura discovered that Robert forgot his luggage, and so she left along the same route, traveling at 54 mi/h, to catch up with him. When did Laura catch up with Robert? \n" ); document.write( "
Algebra.Com's Answer #328818 by mananth(16946)\"\" \"About 
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Robert 45 kmph
\n" ); document.write( "Laura 54 kmph
\n" ); document.write( "Difference in time= 01:30=> 1.5 hours
\n" ); document.write( "Robert will have covered 67.5 miles before Laura starts from home
\n" ); document.write( "catch up distance= 67.5 miles
\n" ); document.write( "catch up speed = 54 -45 mph
\n" ); document.write( "catch up speed = 9 mph
\n" ); document.write( "Catchup time = catchup distance/catch up speed
\n" ); document.write( "catch up time= 67.5 / 9
\n" ); document.write( "catch up time= 7.5 hours \r
\n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca
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