Q 12-13-014NEETJEE MainEasy
The radius of a nucleus of mass number $64$ is ($R_0 = 1.2$ fm)
Answer: (A) $4.8$ fm
Concept. Nuclear radius: $R = R_0A^{1/3}$.
Step 1. Substitute. $64^{1/3} = 4$:
$$R = 1.2 \times 4 = 4.8\ \text{fm}$$
Answer. $4.8$ fm (Option A).
Solution by Sreeraj P, M.Sc Physics