In 2/4 minutes the number of
revolutions a CD makes = 58 ½
<span> = 117/2</span>
Then
In 1 minute the number of
revolutions the CD will make = [(117/2)/(2/4) ] * 1
<span>
=
(117 * 4)/(2 * 2)</span>
<span>
= 117</span>
So it can seen that the CD revolves at the rate of 117 revolutions per minute. I hope this is the answer you were looking for. The procedure for solving this problem is easy for you to understand i hope.
