# Determine the mass of the concrete slab, which is 4 m long, 1.5 m wide and 25 cm thick.

Determine the mass of the concrete slab, which is 4 m long, 1.5 m wide and 25 cm thick. The density of concrete is 2200 kg / m3.

1) Calculate the volume of the concrete slab (the concrete slab is considered a rectangular parallelepiped):

V = a * b * c, where a is the length of the concrete slab (a = 4 m), b is the width of the concrete slab (b = 1.5 m), c is the height of the concrete slab (c = 25 cm or 0.25 m ).

V = 4 * 1.5 * 0.25 = 1.5 m3.

2) Calculate the mass of the concrete slab:

m = ρ * V, where ρ is the concrete density (according to the condition of the problem ρ = 2200 kg / m3).

m = 2200 * 1.5 = 3300 kg.

Answer: The mass of a concrete slab is 3300 kilograms.

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