CBSE 2026 · Region 4 · Set 2 · Q6 · 1 mark
If the distance travelled by a particle in t seconds is given by $\displaystyle \mathrm{S}=72 \mathrm{t}+3 \mathrm{t}^{2}-\mathrm{t}^{3}$, then time taken by the particle to come to rest is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 6$ seconds
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CBSE Class 12 Mathematics past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.