|Math Wizards at Work|
What a Trip!
Joe's Auto Repair received an emergency call that a motorist was stuck on the turnpike. Amy jumped in the tow truck and headed out at 35 miles an hour. An hour later she realized she forgot her tools. Wasting no time Amy immediately turned the truck around and headed back to Joe's at 70 miles an hour and picked up her tools. What was her average speed?