A rock, which weighs 1400 N in air, has an apparent weight of 900 N when submerged in fresh water (998kg/m³) The volume of the rock is:
a. 0.14m³
b. 0.5m³
c. 0.9m³
d. 51 10⁻² m³
e. 9.2 10⁻² m³