The density of a material in SI units is (128 , kg m⁻³). In certain units in which the unit of length is (25 , cm) and the unit of mass is (50 , g), the numerical value of density of the material is:
a) (102 , kg m⁻³)
b) (64 , kg m⁻³)
c) (256 , kg m⁻³)
d) (32 , kg m⁻³)