Answer :
A block of metal having dimensions of 3 cm by 7 cm by 9 cm and the block weighs 450 g, So, the density will be 2.38 g/cm³
Density is defined as the ratio of the mass and volume of a substance. Or it can be explained as mass of substance per unit of its volume. It is denoted by Greek symbol ρ. Its SI unit is kg/m³, but for solids we use g/cm³, for liquids we use g/ml, and for gases we use g/L. Mathematically, it is given as -
ρ = m
v
where,
ρ = density of substance
m = mass of substance
v = volume of substance
Given data -
mass of the block, m = 450 g
volume of block, v = l x b x h
v = 3 x 7 x 9 cm³
v = 189 cm³
To calculate density, we use the equation -
ρ = m
v
Substituting the values in equation,
Density = 450 g
189 cm³
Density = 2.38 g/cm³
Hence,
The calculated density of the metal block is 2.38 g/cm³ or 2830 kg/m³
To learn more about block and density,
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