A) 112.0 km/s
B) 5.6 km/s
C) 280.0 km/s
D) 56.0 km/s
Correct Answer: D
Solution :
Escape velocity \[v=\sqrt{\frac{2\,GM}{R}}\Rightarrow \frac{{{v}_{p}}}{{{v}_{e}}}=\sqrt{\frac{{{M}_{p}}}{{{M}_{e}}}\times \frac{{{R}_{e}}}{{{R}_{p}}}}\] \[\Rightarrow \,\,{{v}_{p}}=5{{v}_{e}}=5\times 11.2=56\,\,km/s\]
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