53.
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 made by
the larger wheel is:
[A]
4
[B]
9
[C]
12
[D] 49
Answer : B
Explanation :
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Let
the required number of revolutions made by larger wheel be x.
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Then, More
cogs, Less revolutions (Indirect Proportion)
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