m = 13.5 kg,
V = 1.5 x 10^-3 m^3
Density = Mass/ Volume
= 13.5/15 x 10^-3 = 900 kg m^-3
As it is less than 1000 kg m^-3 the block will float.
The mass of a block made of certain material is 13.5 kg and its volume is 15 x 10^-3 m^3. Will the block float or sink in water ? (Given that density of water is 1000 kg m^-3)