Determine the mass of the steel bar if three sides are known: 340mm, 715mm, 622mm.

We calculate the mass of a steel bar using the formula:

m = ρ * V, where m is the sought mass of the bar (kg), ρ is the density of the steel (ρ = 7800 kg / m³), V is the volume of the steel bar (V = a * b * c, where a is the length of the steel bar ( a = 340 mm = 0.34 m), b is the width of the steel bar (b = 715 mm = 0.715 m), c is the thickness of the steel bar (c = 622 mm = 0.622 m)).

Let’s calculate the mass of the steel bar:

m = ρ * V = 7800 * 0.34 * 0.715 * 0.622 = 1179.4 kg.

Answer: The mass of the steel bar is 1179.4 kg.