A circular rim 30 inches in diameter rotates the same number of inches per second as a circular rim 15 inches in diameter. If the smaller rim makes x revolutions per second, how many revolutions per minute does the larger rim makes in terms of x ?	Choose one
A) 48pi/x
B) 75x
C) 48x
D) 24x
E) 120x
Revolutions - circumference of the rim.   =&gt; 30pi*X*60 = 15pi*Revolutions   =&gt; 2/1 *X *60 = Revolutions =&gt; 120X - Option 120x
<result>E</result>
A circular rim 30 inches in diameter rotates the same number of inches per second as a circular rim 15 inches in diameter. If the smaller rim makes x revolutions per second, how many revolutions per minute does the larger rim makes in terms of x ?