A hollow copper ball with a volume of 30 cubic centimeters and a mass of 178 grams is used to calculate the volume of the hollow part of the copper ball

A hollow copper ball with a volume of 30 cubic centimeters and a mass of 178 grams is used to calculate the volume of the hollow part of the copper ball

It should be the topic of density
V Cu = m Cu / P Cu = 178g / 8.9g/cm = 20cm3
V air = V total - V copper = 30cm3-20cm3 = 10cm3