<PRE><B>Question 261721</B>
A machine has three interlocking gears . 
Gear A has 18 teeth and turns clockwise at 30 revolutions per minute. 
Gear B turns counter-clockwise and has 36 teeth. 
Gear C turns clockwise and has 9 teeth. 
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How many revolutions does gear C turn in one minute ? 
In one min a turns 30 revs = 30*18 teeth = 540 teeth
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In the same min B turns 540/36 = 15 revs = 540 teeth
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In the same min C turns 540/9 = 60 revs
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Cheers,
Stan H.</PRE>