A) \[2\times {{10}^{8}}\text{ }m/s\]
B) \[3\times {{10}^{5}}\text{ }m/s\]
C) \[1.5\times {{10}^{8}}\text{ }m/s~~~~\]
D) \[1.8\times {{10}^{5}}\text{ }m/s\]
E) None of these
Correct Answer: C
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