At what depth the acceleration due to gravity becomes zero ?

Explanation

To find the depth at which the acceleration due to gravity becomes zero, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Formula**:
The acceleration due to gravity at a depth \( D \) inside the Earth is given by the formula:
\[
g' = g \left(1 - \frac{D}{R_E}\right)
...