A) 12 km/s
B) 1 km/s
C) \[\sqrt{2}\]km/s
D) \[2\sqrt{2}\,\,km/s\]
Correct Answer: C
Solution :
\[{{v}_{0}}=\frac{{{v}_{e}}}{\sqrt{2}}=\frac{2}{\sqrt{2}}=\sqrt{2}\ km/s\]
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