CBSE 2026 · Region 4 · Set 3 · Q6 · 1 mark
A cylindrical tank is being filled with sand at a rate of $\displaystyle 314 \mathrm{~m}^{3} / \mathrm{h}$. If the radius of the tank is $\displaystyle 10$ m, then the height of sand in the tank increases at the rate of:
Official answer
From CBSE’s own marking scheme for this paper.
(B)
$\displaystyle 1$ m/h
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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.