CBSE 2025 · Region 4 · Set 3 · Q5 · 1 mark
In the adjoining figure, AC is diameter of larger circle with centre $\displaystyle \mathrm{O} . \mathrm{AB}$ is tangent to smaller circle with centre O. If $\displaystyle \mathrm{OD}=r$, then BC is equal to :
Official answer
From CBSE’s own marking scheme for this paper.
(C)
$\displaystyle 2 r$
CirclesTangent to a CircleApplymcqmedium
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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.