A circular rim 35 inches in diameter rotates the same number of inches per second as a circular rim 42 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 the correct choice from the following
A) 48pi/x B) 50x C) 48x D) 24x E) x/75
C = (pi)d   C(small): (pi)*35   C(large): (pi)*42   Lets say the time horizon is 60 seconds, so during that time the smaller rim covers a distance of (pi)*35*60 = (pi)*(2100) inches   (pi)*(2100) = (pi)*(42)(x)   pi*(50) = pi*(x)   50=x   Answer: 50x.
<result>B</result>
A circular rim 35 inches in diameter rotates the same number of inches per second as a circular rim 42 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 ?