SOLUTION: man drives car at 80 miles per hour for 30 minutes. His wife tries to meet up with him going 90 miles per hour. How long will she have to drive to catch him? and how far from the

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Question 297056: man drives car at 80 miles per hour for 30 minutes. His wife tries to meet up with him going 90 miles per hour. How long will she have to drive to catch him? and how far from their house will she finnally meet up with him?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Assuming that the man had 30 minute head start
he would have gone 40 miles
she gains on him at 10 mph
so it will take her 4 hrs to catch up.
80*(t+1/2)=90t
as expected t=4