A solid sphere, disc and solid cylinder, all of the same mass, are allowed to roll down (from rest) on inclined plane, them

Options

A. solid sphere reaches the bottom first
B. solid sphere reaches the bottom late
C. disc will reach the bottom first
D. all of them reach the bottom at the same time

Explanation

Time to reach at the bottom
`t=sqrt((2h)/(g))xx(1)/(sintheta)xxsqrt(1+k^(2)//R^(2))`
`t` is minimum for solid sphere