CBSE 2025 · Region 2 · Set 1 · Q11 · 1 mark
A cylindrical tank of radius $\displaystyle 10$ cm is being filled with sugar at the rate of $\displaystyle 100 \pi \mathrm{~cm}^{3} / \mathrm{s}$. The rate, at which the height of the sugar inside the tank is increasing, is:
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 1 \mathrm{~cm} / \mathrm{s}$
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CBSE Class 12 Mathematics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.