A) 3.7 km/s
B) 11.2 km/s
C) 22.4 km/s
D) 43.2 km/s
Correct Answer: C
Solution :
\[\frac{{{v}_{p}}}{{{v}_{e}}}=\sqrt{\frac{{{M}_{p}}}{{{M}_{e}}}\times \frac{{{R}_{p}}}{{{R}_{e}}}}=\sqrt{8\times \frac{1}{2}}=2\]\\[{{v}_{p}}=2\times {{v}_{e}}=22.4km/s\]
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