Moment of inertia

Question

A 0.225 m radius solid sphere has a

moment of inertia of 0.123 kg-m².

What is its mass?

(Kg) can someone please answer this ?

Answer 1

The moment of inertia of a solid sphere (You can derive this or look it up in a table of moments of inertia or Google moment of inertia sphere) is (2/5)MR².= I

Solve for M = 5I/2R² (the units given will yield kg)