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A thermodynamic system is taken through cyclic process. The total work done in the process is :
Work Done = $$\text{Area of } \triangle CDE = \frac{1}{2} \times \text{Base} \times \text{Height}$$
$$W = \frac{1}{2} \times 2 \text{ m}^3 \times 300 \text{ Pa}$$
$$W = 300 \text{ J}$$
Since the cycle $$C \to D \to E \to C$$ is clockwise, the net work done is positive.
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