Question

Two solid discs of radii r and 2r roll from the top of an inclined plane without slipping. Then
(1) The bigger disc will reach the horizontal level first
(2) The small disc will reach the horizontal level first
(3)
The time difference of reaching of the discs at the horizontal level will depend on the
inclination of the plane
(4) Both the discs will reach at the same time
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Answer 1

Answer:

4th

because their k^2/R^2 value for all disc have same .