Pi Problem

Question

An odometer determines the distance a car has traveled by counting the number of revolutions the tires has made. It calculates the distance traveled by multiplying the number of revolutions by the circumference of the tire. If your tires have a radius of 25 inches and your odometer says you have driven 10 miles, how many revolutions have your tires made?

 

Use:

12 inches = 1 foot

 

1 mile = 5280 feet

 

Circumference = 2*pi*radius (1 revolution)

 

Distance Traveled = revolutions * circumference

 

SHOW ALL WORK

THANK YOU

Answer 1

Chantelle, I hope I can still help.

 

12 inches/1 foot x 5280 feet/1 mile = 63360 inches/mile.

 

Circumference = 2*pi*25 = 157 inches

 

63360 inches/mile x 1 revolution/157 inches = 403.6 revolutions/mile

 

403.6 revolutions/mile x 10 miles = 4036 revolutions.

 

Hope this helps!