Question

Enter your answer and show all the steps that you use to solve this problem in the space provided.

The diameter of a tire is 2.5 ft. Use this measurement to answer parts a and b. Show all work to receive full credit.

Find the circumference of the tire.
About how many times will the tire have to rotate to travel 1 mile? (1 mile = 5,280 ft

Answer 1

Part A: Is 7.85

Part B: 672 rotations.

Explanation:

Part A: We can use either formula C=pi x d or C= 2 x Pi x r. All you have to do is multiply 3.14 by 2.5 which would equal 7.85.

Part B: For this, all we do is divide 5,280 by the answer of the circumference which is 7.85 to get 672. You would have to set this up as a fraction where 5,280 ft goes on top and 7.85 ft per rotation at the bottom.

• Pi equals 3.14
• The r represents the radius
• D represents diameter
• C is for circumference.

Hope this helps.