An object whose mass is $12$ kg and moment of inertia is $3\mathrm{.}0$ kg m$\text{'}$ is rotating at $20$ rev$/$s$.$ How fast should it travel in a straight line $($without rotation$)$ to have the same kinetic energy?

$($a$)63$ m$/$s

$($b$)21$ m$/$s

$($c$)9\mathrm{.}0$ m$/$s

$($d$)36$ m$/$s

$($e$)45$ m$/$s