What's the density of a block of granite with a mass of 21.7kg measuring 0.45m x 0.35m x 0.05m?

Answer 1

density is mass / volume

21.7kg / (0.45m x 0.35m x 0.05m)

2755.55 kg/m^3

Answer 2

Volume V of the block of Granite:
V= L* W* H= 0.45*0.35*0.05 =0.007875 m^3.
The density D is given by :
D = M/V =21.7/0.007875 = 2755.6kg/m^3.

Answer 3

The usual density for a granite is about 2.7 t/m³.
They are right and your sample must be a granite!