A wheel that has 24 cogs is meshed with a larger wheel of 48 cogs. When the smaller wheel has made 12 revolutions, then the number of revolutions mad by the larger wheel is: Choose the correct answer:
A) 6
B) 5
C) 3
D) 7
E) 4
A   6   Let the required number of revolutions made by larger wheel be x.   Then, More cogs, Less revolutions (Indirect Proportion)   48 : 24 :: 12 : x &lt;-&gt; 48 x x = 12 x 24   x = (12x 24)/48   x = 6
<result>A</result>
A wheel that has 24 cogs is meshed with a larger wheel of 48 cogs. When the smaller wheel has made 12 revolutions, then the number of revolutions mad by the larger wheel is: