If a tire rotates at 400 revolutions per minute when the car is traveling 72km/h, what is the circumference of the tire?	Options.
A) 7 meters B) 9 meters C) 8 meters D) 5 meters E) 3 meters

Rationale: "400 rev / minute = 400 * 60 rev / 60 minutes = 24,000 rev / hour 24,000 * c = 72,000 m : c is the circumference c = 3 meters correct answer e"
Answer: E