SOLUTION: If Kathy left the house going 55mph and a half hour later her mom going 70 mph how long will it take her to catch up
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Question 344650: If Kathy left the house going 55mph and a half hour later her mom going 70 mph how long will it take her to catch up Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! kathy's speed = 55mph
mom left 1/2 hour later
so by then kathy has traveled 22.5 miles
..
difference between their speeds = 15 mph.
so every hour mom cathes up 15 miles.
she has to catch up 22.5 miles
22.5 / 15 = 1.5 hours
she will catch up after 1.5 hours
