An iron casting containing a number of cavities weight `6000N` in air and `4000N` in water. What is the volume of the cavities in the casting? Density of iron is `7.87g//cm^(3)`. Take `g = 9.8 m//s^(2)` and density of water `= 10^(3) kg//m^(3)`.

Options

A. `0.16 m^3`
B. `0.2 m^3`
C. `0.12 m^3`
D. `0.14 m^3`

Answer

C