From which material is a parallelepiped made if it has the following dimensions: L = 10 cm, l = 4 cm, h = 2,5 cm, and weighs 0,78 kg?

From which material is a parallelepiped made if it has the following dimensions: L = 10 cm, l = 4 cm, h = 2,5 cm, and weighs 0,78 kg?

We know:

m = 0.78 kg
L = 10 cm
l = 4 cm;
h = 2.5 cm
Volume parallelipiped = V = L x l x h
ρ =?



Solution

m = ρ x V
ρ = m / V
ρ = 0.78 kg / (10 cm x 4 cm x 2.5 cm)
ρ = 0.78 kg / 100 cm³
ρ = 0.78 kg / 0.0001 m³
ρ = 7800 kg / m³

According to the substances density, the parallelepiped is made of:
Iron = ρ = 7800 kg / m³


Legend
m = mass (kg)
L = parallelepiped length
l = parallelipiped width
h = parallelepiped height
ρ = density (kg / m3)

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