A) \[7\centerdot 5\times {{10}^{5}}Joule\]
B) \[10\times {{10}^{3}}Joule\]
C) \[9\centerdot 4\times {{10}^{3}}Joule\]
D) \[6\centerdot 2\times {{10}^{4}}Joule\]
Correct Answer: D
Solution :
Energy spent = power x time \[=17\,.\,42\times 60\times 60=6.2\times {{10}^{4}}\] joule
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