In order to calculate the escape speed, we can use the formula below:
[tex]v=\sqrt[]{\frac{2GM}{d}}[/tex]So, for G = 6.67 * 10^-11, M = 6.5 * 10^24 and d = 70 * 10^9, we have:
[tex]\begin{gathered} v=\sqrt[]{\frac{2\cdot6.67\cdot10^{-11}\cdot6.5\cdot10^{24}}{70\cdot10^9}} \\ v=\sqrt[]{\frac{86.71\cdot10^{13}}{70\cdot10^9}} \\ v=\sqrt[]{1.2387\cdot10^4} \\ v=1.113\cdot10^2 \\ v=111.3\text{ m/s} \end{gathered}[/tex]