The cast iron ingot has a mass of 24500 g and an external volume of 3100 cm3. Is there a void inside the ingot?

To determine the presence of a void in a cast iron ingot, we calculate the mass of this ingot, taking it as a solid one, and compare it with the actual mass.

m1 = ρ * V, where ρ is the density of cast iron (ρ = 7000 kg / m³), V is the outer volume of the ingot (V = 3100 cm³ = 3100 * 10-6 m³).

m1 = ρ * V = 7000 * 3100 * 10-6 = 21.7 kg.

Actual mass m = 24500 g = 24.5 kg.

Answer: Since the resulting mass is less than the actual one, the ingot has no cavity, but has impurities of other substances with density indicators higher than that of cast iron.