CBSE 2025 · Region 7 · Set 2 · Q10 · 1 mark
The mass numbers of two nuclei A and B are $\displaystyle 27$ and $\displaystyle 64$ respectively. The ratio of their radii $\displaystyle \left(\frac{r_{A}}{r_{B}}\right)$ will be :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle \frac{3}{4}$
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CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.