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:
A) 2
B) 1
C) 4
D) 6
E) 5
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
<result>D</result>
If a tire rotates at 400 revolutions per minute when the car is traveling 144km/h, what is the circumference of the tire?