Two hours after a truck leaves Phoenix traveling at 45 miles per hour, a car leaves to overtake the truck. If it takes the car ten hours to catch the truck, what was the car’s speed?

Answer 1

The truck traveled for 12 hours, or 540 miles

540 mi / 10 hr = 54 mph

Answer 2

If the car travels 10 hrs, the truck has travelled 12 hrs; therefore

45*12=10s

s=54