While spinning down from $100\mathrm{.}0$ rpm to rest, a solid uniform flywheel does $7\mathrm{.}4$ J of work. If the mass of the disk is $2$ kg what is its radius? $)=(\frac{1}{2}M{R}^2$

A$)0\mathrm{.}13$ m

B$)0\mathrm{.}37$ m

C$)1\mathrm{.}19$ m

D$)1\mathrm{.}42$ m