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07022014  #1 
Join Date: Jun 2014
Posts: 14

A problem on Wheel and revolutions
Help required to solve algebra 1 homework problem
A wheel that has 14 cogs is meshed with a smaller wheel of 6 cogs. When the smaller wheel has made 21 revolutions, then what is the number of revolutions made by larger wheel? Thanks 
07102014  #2 
Join Date: Aug 2013
Posts: 20

14 : 6 = x : 21
x = (21 * 6) / 14 You can count the cogs, 21 revolutions * 6 cogs = 126 cogs Divide the whole number of cogs though the number of cogs on the larger wheel. They have the same distance on the larger wheel. 126 / 14 = 9 
07102014  #3  
Join Date: Dec 2008
Posts: 249

Quote:
The larger wheel then makes 126/14 = 9 revolutions 

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