SOLUTION: 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 c

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?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Robert 45 kmph
Laura 54 kmph
Difference in time= 01:30=> 1.5 hours
Robert will have covered 67.5 miles before Laura starts from home
catch up distance= 67.5 miles
catch up speed = 54 -45 mph
catch up speed = 9 mph
Catchup time = catchup distance/catch up speed
catch up time= 67.5 / 9
catch up time= 7.5 hours
m.ananth@hotmail.ca
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