Algebra & Trig

Question

A steamroller, whose wheel has a diameter of 2 feet, has just completed a pass over a driveway that is 30 feet in length. How many rotations of the roller were required?

Answer 1

30 ft = n rotations (circumference of wheel)

 

C = 2pi(1)

 

30 = n(2)(pi).  Solve for n.