If Earth has mass nine times and radius twice that of the planet Mars, calculate the velocity required by a rocket to pull out of the gravitational force of Mars. Take escape speed on surface of Earth to be `11.2km//s`

Explanation

To find the escape velocity required for a rocket to pull out of the gravitational force of Mars, we can use the relationship between the escape velocities of Earth and Mars based on their masses and radii.

### Step-by-Step Solution:

1. **Identify Given Values:**
- Mass of Earth (Me) = 9 * Mass of Mars (Mm)
- Radius of Earth (Re) = 2 * Radius of Mars (Rm)
- Escape velocity on Earth (Ve) = 11.2 km/s
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