If a tire rotates at 400 revolutions per minute when the car is traveling 120km/h, what is the circumference of the tire? Choose the correct option.
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 = 12,0000 m : c is the circumference c = 5 meters correct answer d
Answer: D