SOLUTION: I am not shore how do do this please help. Girl A leaves on a long trip driving at a rate of 45 miles per hour. Girl B leaves from the same location traveling to the same destinat

Question 756231: I am not shore how do do this please help.
Girl A leaves on a long trip driving at a rate of 45 miles per hour. Girl B leaves from the same location traveling to the same destination 2 hours later. Girl B drives at a steady rate of 55 miles per hour. How long after Girl B leaves home will Girl A catch up?
I keep geting 10hours, but I dont think im right
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Girl A leaves on a long trip driving at a rate of 45 miles per hour. Girl B leaves from the same location traveling to the same destination 2 hours later. Girl B drives at a steady rate of 55 miles per hour. How long after Girl B leaves home will Girl A catch up?
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In 2 hours Girl A is 90 miles away (45*2).
Girl B "gains on her" at 10 mi/hr (55-45).
90/10 = 9 hours after Girl B leaves.
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How long after Girl B leaves home will Girl A catch up?
Girl B catches up.
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