A) \[4\]
B) \[9\]
C) \[12\]
D) \[49\]
Correct Answer: B
Solution :
The more the number of cogs the less the number of revolutions.Cogs | Revolutions |
6 | 21 |
1 | \[6\times 21\] |
14 | \[\frac{6\times 21}{14}=9\] |
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