A square plate of mass `10kg` and side `20m` is moving along the groove with the help of two ideal rollers (massless), connected at the corners `A` and `B` of the square, as shown in the figure. At a certain moment of time, during motion, the corner `A` is moving with velocity `16m//s` downward. Find the speed of corner `D`.

Options

A. `32 m//s`
B. `16 m//s`
C. `8 m//s`
D. none

Explanation

Centre of square behaves as instantaneous centre of rotation.