Suppose a planet exist whose mass and diameter both are twice of earth. Calculate acceleration due to gravity on this planet. On earth, take `g=9.8 m//s`.

Explanation

To calculate the acceleration due to gravity on a planet whose mass and diameter are both twice that of Earth, we can follow these steps:

### Step 1: Understand the formula for acceleration due to gravity
The acceleration due to gravity (g) at the surface of a planet is given by the formula:
\[ g = \frac{G \cdot M}{R^2} \]
where:
- \( G \) is the universal gravitational constant,
- \( M \) is the mass of the planet,
...