SOLUTION: A gear 12 cm in diameter, is turning a gear 18 cm in diameter. when the smaller gear has made 42 revolutions how many has the larger one made?
a)24
b)28
c)50
d)63
e)72
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-> SOLUTION: A gear 12 cm in diameter, is turning a gear 18 cm in diameter. when the smaller gear has made 42 revolutions how many has the larger one made?
a)24
b)28
c)50
d)63
e)72
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Question 693867: A gear 12 cm in diameter, is turning a gear 18 cm in diameter. when the smaller gear has made 42 revolutions how many has the larger one made?
a)24
b)28
c)50
d)63
e)72 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A gear 12 cm in diameter, is turning a gear 18 cm in diameter. when the smaller gear has made 42 revolutions how many has the larger one made?
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smaller gear perimeter: 12(pi) in
larger gear perimeter: 18(pi) in
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# of revs of larger = (42*12(pi))/18(pi) = (2/3)42 = 28
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Cheers,
Stan H.
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a)24
b)28
c)50
d)63
e)72
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