A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs.

A wheel that has 6 cogs is meshed with a larger wheel of 14 cA 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 isogs. When the smaller wheel has made 21 revolutions, then the number of revolutions made by the larger wheel is

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It is given that a wheel which has 6cogs is meshed with a large wheel which has 14cogs.

To find the number of revolution made by the larger wheel if the small wheel has made 21revolutions.

Let the number of revolutions made by the larger wheel be y.

Since the number of cogs is inversely proportion to the number of revolution of the wheels.

So,

6 / 14 = y / 21

y = 6 x 21 /14 = 9

Thus, option (B) is correct.Hence, option (B) is correct.

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