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 most appropriate option.
A) 7 meters	B) 9 meters	C) 8 meters	D) 5 meters	E) 3 meters
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 5 meters
<result>D</result>
If a tire rotates at 400 revolutions per minute when the car is traveling 120km/h, what is the circumference of the tire?