Using KE= I2/2 from problem 2.11a, how fast would a flywheel whose moment of inertia is 200 lb.ft2 have to spin in RPM, to store

Using KE= Iω2/2 from problem 2.11a, how fast would a flywheel whose moment of inertia is 200 lb.ft2 have to spin in RPM, to store an amount of kinetic energy equivalent to the potential energy of a 100 lb mass raised to an elevation of 30 ft above the surface of the earth? Let g= 32.2 ft/s2.