A) \[4.5\times {{10}^{10}}\text{ }cm/s\]
B) \[2\times {{10}^{10}}\text{ }cm/s\]
C) \[0.5\times {{10}^{10}}\text{ }cm/s\]
D) \[1.5\times {{10}^{10}}\text{ }cm/s\]
Correct Answer: B
Solution :
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