Rotational Motion: JEE Main 2021 Physics question

A circular disc reaches from top to bottom of an inclined plane of length 'L'. When it slips down the plane, it makes time 't₁'. When it rolls down the plane, it takes time t₂. The value of ${{{t_2}} \over {{t_1}}}$ is $\sqrt {{3 \over x}}$. The value of x will be _______________.