The volume of aluminum is 400cm3 and the mass is 810g. Is the ball hollow or solid? What is the volume of Wilbur hollow? I know. Let's talk

The volume of aluminum is 400cm3 and the mass is 810g. Is the ball hollow or solid? What is the volume of Wilbur hollow? I know. Let's talk


M = 810 g of aluminum
V=m/p=810/2.7=300cm^3