How heavy (lbs) does a flywheel have to be.........see details?

Question

How heavy (in Lbs) does a flywheel have to be to produce a moment of inertia of 110.9 pound feet squared (slugs)?

Answer 1

I=.5 mR^2

since I=110.9
m =2(110.9 )/R^2
m=221.8/R^2

So what is R ( radius of the flywheel)

Answer 2

I dont comprehend with regard to the grams or something yet from the phraseology of your query I dont think of you comprehend what lbs. is that's the abbreviation for pounds so it would be 5-7 pounds.