If a car has wheels with a diameter of three feet.  About how many
miles per hour is the car going, if the wheels are turning at about
600 times per minute?

biga626 --

The answer is approximately 64.26 miles per hour.

The formula for solving the problem is found at this website:

Math Forum
http://mathforum.org/library/drmath/view/60367.html


The formula described there for this problem is:

(minutes in an hour) X (revolutions per minute) X (wheel diameter in
inches) X (pi)  DIVIDED BY (feet in a mile) times (inches in a foot) =
(speed in miles per hour)


Using the numbers you have stated, the problem then would be:

60 X 600 X 36 X 3.1416  DIVIDED BY 5280 X 12

The answer to that problem, as I stated above, is 64.26 mph


Search Strategy:

I found the formula with the following Google search:

formula diameter wheel speed minute
://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGLD,GGLD:2004-01,GGLD:en&q=formula+diameter+wheel+speed+minute


I urge you to visit the site linked above to get a fuller
understanding of the problem and its solution.  Other sites returned
as "hits" with the Google search terms I used could also be helpful to
you.


markj-ga