A small ring of negligible thickness and radius 2 cm moves on a bigger rung of r

Question

A small ring of negligible thickness and radius 2 cm moves on a bigger rung of radius 10 cm. How many rotations will the small ring take on the bigger ring to make a complete round ?

Options:

A . 5

B . 6

C . 7

D . 10

Answer: Option A

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