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Mathematics · 2025 · 1 mark
CBSE 2025 · Region 1 · Set 1 · Q20
Assertion (A) : If we join two hemispheres of same radius along their bases, then we get a sphere.
Reason (R): Total Surface Area of a sphere of radius r is $\displaystyle 3 \pi \mathrm{r}^{2}$.
Official answer
From CBSE’s own marking scheme for this paper.
(C)
Assertion (A) is true, but Reason (R) is false.
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CBSE Class 10 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.