# Density of the concrete

Find the density of the concrete of the cuboid-shaped column has dimensions of 20 x 20 cm x 2 m if the weight of the column is 200 kg.

Correct result:

h =  2500 kg/m3

#### Solution:

$a=20 \ cm \rightarrow m=20 / 100 \ m=0.2 \ m \ \\ b=20 \ cm \rightarrow m=20 / 100 \ m=0.2 \ m \ \\ c=2 \ \text{m} \ \\ \ \\ m=200 \ \text{kg} \ \\ \ \\ V=a \cdot \ b \cdot \ c=0.2 \cdot \ 0.2 \cdot \ 2=\dfrac{ 2 }{ 25 }=0.08 \ \text{m}^3 \ \\ \ \\ h=m/V=200/0.08=2500 \ \text{kg/m}^3$

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