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 option
A) 2 meters	B) 6 meters	C) 5 meters	D) 3 meters	E) 7 meters
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 6 meters
<result>B</result>
If a tire rotates at 400 revolutions per minute when the car is traveling 144km/h, what is the circumference of the tire?