JEE Advanced 2018 Paper 1

A ring and a disc are initially at rest, side by side, at the top of an inclined plane which makes an angle 60° with the horizontal. They start to roll without slipping at the same instant of time along the shortest path. If the time difference between their reaching the ground is (2−√3)/√10s, then the height of the top of the inclined plane, in meters, is ________.
Take g=10m/s2