We calculate the mass of the gold bar by the formula:
m = ρ * V, where m is the sought mass of the gold bar (kg), ρ is the density of gold (ρ = 19320 kg / m³), V is the volume of the gold bar (V = a * b * c, where a is the length of the bar ( a = 5 cm = 0.05 m), b is the width of the bar (b = 3 cm = 0.03 m), c is the thickness of the bar (c = 1 cm = 0.01 m)).
Let’s calculate the mass of the golden bar:
m = ρ * V = ρ * a * b * c = 19320 * 0.05 * 0.03 * 0.01 = 0.29 kg.
Answer: The mass of a gold bar is 0.29 kg.
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