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## Homework Statement

A tractor has a belt pulley diameter of 10 inch operating at 1100 revolutions per minute. The pulley is connected by a belt to another machine that needs to operate at 650 rpm. What size should the pulley be on the second machine?

## Homework Equations

2Pi*r

## The Attempt at a Solution

I don't really know where to start. I know that a wheels circumference is 2Pi*r

The first wheel is 10 inches so

2*Pi*5 inches = 1100rpm

if the second wheel has to operate at 650

can I get it by 650/2pi=103 inches?