CBSE 2024 · Region 3 · Set 1 · Q5 · 1 mark
If the sides of a square are decreasing at the rate of $\displaystyle 1.5 \mathrm{~cm} / \mathrm{s}$, the rate of decrease of its perimeter is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 6 \mathrm{~cm} / \mathrm{s}$
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CBSE Class 12 Mathematics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.