If a tire rotates at 400 revolutions per minute when the car is traveling 144km/h, what is the circumference of the tire? Choose the correct choice from the following answers
A) 2 meters
B) 6 meters
C) 5 meters
D) 3 meters
E) 7 meters

Rationale: "400 rev / minute = 400 * 60 rev / 60 minutes = 24,000 rev / hour 24,000 * c = 144,000 m : c is the circumference c = 6 meters correct answer b"
Answer: B