A) \[8\times {{10}^{5}}J\]
B) \[16\times {{10}^{5}}J\]
C) \[12\times {{10}^{5}}J\]
D) \[32\times {{10}^{5}}J\]
Correct Answer: B
Solution :
Work \[W=mgh+\Delta pV\] \[=V\rho gh+\Delta pV\] \[=4\times {{10}^{3}}\times 10\times 20+(2\times {{10}^{5}})\times 4\] \[=16\times {{10}^{5}}J\]
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