



 
Hi Kenzi, $\large\frac{360}{45} = 8$ so the wheel rotates one eights of a revolution per second. \[\frac18 \frac{\mbox{revolutions}}{\mbox{second}} \times \frac{60}{1} \frac{\mbox{seconds}}{\mbox{minute}} = \frac{60}{8} \mbox{RPM.}\] Penny  


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