A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is: Choose the correct choice from the following options.
A) 3	B) 8	C) 2	D) 1	E) 9
E   9   Let the required number of revolutions made by larger wheel be x.   Then, More cogs, Less revolutions (Indirect Proportion)   14 : 6 :: 21 : x &lt;-&gt; 14 x x = 6 x 21   x = (6 x 21)/14   x = 9
<result>E</result>
A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is: