SOLUTION: Fred left the city for vacation. Dan left four hours later going forty mph faster to catch up. After three hours Dan caught up. What was Fred's average speed?

SOLUTION: Fred left the city for vacation. Dan left four hours later going forty mph faster to catch up. After three hours Dan caught up. What was Fred's average speed?

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Question 1042096: Fred left the city for vacation. Dan left four hours later going forty mph faster to catch up. After three hours Dan caught up. What was Fred's average speed?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Let

represent Fred's speed. For 4 hours plus the 3 hours Dan took to catch up, Fred travelled at

miles per hour, so he travelled a total of

miles. Dan travelled that same distance in 3 hours at

miles per hour. So,

Solve for

John

My calculator said it, I believe it, that settles it

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