SOLUTION: Nancy left on vacation. Sara left 7 hours later traveling 47 mph faster to catch up. After 6 hours Sara caught up. What was Nancy's average speed?

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Question 900735: Nancy left on vacation. Sara left 7 hours later traveling 47 mph faster to catch up. After 6 hours Sara caught up. What was Nancy's average speed?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
6*47=282 distance Nancy traveled in 7 hours.
282/7=40.2857 Nancy average speed
Sara's speed was 40.2857+47=87.2857