Calculate net work done by the gas whose thermodynamical behaviour is represented by right angled triangle ABC on `P-V` diagram. The `P-V` diagram co-ordinates are : `A(20, 6), B(10, 12)` and `C(10, 6)` where `P` is in `Nm^(-2)` and `V` is in `m^(3)`

Answer

30 J