Gravitational field at the surface of a solid sphere is `1.5 xx 10^(-4) "N kg"^(-1)`. Find the gravitational field at a point situated inside the sphere at a distance equal to half of rhe radius of the solid sphere.

Explanation

To find the gravitational field at a point situated inside a solid sphere at a distance equal to half of the radius of the sphere, we can use the following steps:

### Step-by-Step Solution:

1. **Understand the Gravitational Field at the Surface**:
The gravitational field \( E \) at the surface of a solid sphere is given as \( 1.5 \times 10^{-4} \, \text{N kg}^{-1} \).

2. **Use the Formula for Gravitational Field Inside a Sphere**:
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