If a solid block of substance is 78.0 cm by 55.0 cm by 35.0 cm and it weighs 569 g then its density is 0.00379 g/cm³.
Density of a substance = (mass of the substance)/(volume occupied by the substance)
Mass of the substance = 569 g.
Length of the block = 78.0 cm
Breadth of the block = 55.0 cm
height of the block = 35.0 cm
Volume of the substance = length x breadth x height
= 78.0 cm x 55.0 cm x 35.0 cm
= 150150 cm³
Density of this substance = 569 g/150150 cm³
= 0.00379 g/cm³
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