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Mathematics · 2023 · 1 mark
CBSE 2023 · Region 2 · Set 1 · Q6
If the pair of equations 3 x - y +8=0 and 6 x - ry +16=0 represent coincident lines, then the value of 'r' is:
If the pair of equations $\displaystyle 3 \mathrm{x}-\mathrm{y}+8=0$ and $\displaystyle 6 \mathrm{x}-\mathrm{ry}+16=0$ represent coincident lines, then the value of 'r' is :
Official answer
(D)
$\displaystyle 2$
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CBSE Class 10 Mathematics past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.