A) \[28\,{{P}_{1}}{{V}_{1}}\]
B) \[14\,{{P}_{1}}{{V}_{1}}\]
C) \[18\,{{P}_{1}}{{V}_{1}}\]
D) \[9\,{{P}_{1}}{{V}_{1}}\]
Correct Answer: D
Solution :
From the figure, work done is given by W = area of triangle ABC \[=\frac{(7{{P}_{1}}-{{P}_{1}})\times (4{{V}_{1}}-{{V}_{1}})}{2}\] \[=\frac{6{{P}_{1}}\times 3{{V}_{1}}}{2}\] \[=9{{P}_{1}}{{V}_{1}}\]
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