We are asked to determine the escape velocity of a planet of radius 6x10^7 m.
to do that we will use the fact that the escape velocity of a planet is given by the following formula:
![v_e=\sqrt[]{2gR}](https://img.qammunity.org/2023/formulas/physics/college/crhegiangoqe2a3uwcxot02zt6k7qttghs.png)
Where:

Now, we substitute the values:
![v_e=\sqrt[]{2(42.9(m)/(s^2))(6*10^7m)}](https://img.qammunity.org/2023/formulas/physics/college/gys1wght5gg835mv0g9uh7gpkn5sfiej51.png)
Solving the operations:

Therefore, the escape velocity is 71749.6 m/s.