A piece of brass of volume 30 cm³ has a mass of 252 g. Find the density of brass in:

(i) g cm^-3

(ii) kg m^-3

A cork has a volume 25 cm³. The density of cork is 0.25 g cm^-3. Find the mass of the cork.

Find the approximate area of an irregular lamina of which boundary line is drawn on the graph paper shown in figure below.

The mass of 5 litre of water is 5 kg. Find the density of water in g cm^-3.