5 kg of material A occupy 20 cm3 whereas 20 kg of material B occupy 90 cm3. Which has the greater density: A or B? Support your answer with calculations.

For material A: Mass= 5kg

Volume =20 cm3


= 20 x 10-6 m3


Density of material A = 5 / 20 * 10-6 = 0.25 * 106 kg/m3


For material B:


Mass = 20kg


Volume = 90 cm3


= 90 x 10-6 m3


Density of material B = 20 / 90 * 10-6 = 0.22 * 106 kg/m3


Density of material A is more than density of material B.


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