"A small ring of negligible thickness and radius 2 cm moves on a bigger rung of radius 10
Channel: Doubtnut
Date: 2020-04-05

"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?
(a) 5 (b) 6 (c) 7 (d) 10"