what is the nuclear radius ` of .^(125)` Fe , if that of `"".^(27) Al `is 6.4 fermi?

Explanation

To find the nuclear radius of \(^{125}\text{Fe}\) given that the nuclear radius of \(^{27}\text{Al}\) is 6.4 fermi, we can use the relationship between the nuclear radius and the mass number.

### Step-by-Step Solution:

1. **Understand the Relationship**:
The radius of a nucleus \( R \) is given by the formula:
\[
R = R_0 A^{1/3}
...