<PRE><B>Question 303987</B>
How many MPH (to the nearest 100th) is a car traveling if the wheels have a diameter of 3 feet and they are turning 600 times a minute?

diameter of wheel = 3 feet

circumference of wheel = pi*D

= pi*3 
=9.42 

 one revolution it covers a distance of 9.42 feet

600 revolutions it covers a distance of 600 * 9.42
= 5654.86 feet - this distance the car covers in 1 minute

so in 60 minutes it covers a distance of 5654.86*60

=339,292 feet / hour

= 339,292 / 5280 = 64.26 mph  (5280 feet = 1 mile)

Ananth 

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