Rim Type Flywheel

What is the value of the radius of gyration of rim type flywheel as compared to a disc type flywheel for the same diameter?
What is the value of the radius of gyration of the rim type flywheel as compared to disc type flywheel for the same diameter?
What is the moment of inertia of rim type of flywheel?
Which of the following statements are correct?
Statement A: To absorb energy when demand of energy id less than the supply
Statement B: To give out energy when demand of energy is more than the supply.