Heat And Thermodynamics

An ideal gas changes its state from \(\mathrm{A}\) to \(\mathrm{C}\) in two different paths \(\mathrm{ABC}\) and \(\mathrm{AC}\). The internal energy of the gas at state \(\mathrm{C}\) is \(20 \mathrm{~J}\) and at state \(\mathrm{B}\) is \(10 \mathrm{~J}\). Heat supplied to the gas to go from \(\mathrm{B} \rightarrow \mathrm{C}\) is