Mathematics · 2021
JEE Main · 27 August 2021, Shift 2 · Q80
Two poles, A B of length a metres and C D of length a+b(b ≠ a) metres are erected at the same horizontal level with bases at B and D. If BD =x and…
Two poles, $\displaystyle A B$ of length $\displaystyle a$ metres and $\displaystyle C D$ of length $\displaystyle a+b(b \neq a)$ metres are erected at the same horizontal level with bases at B and D . If $\displaystyle \mathrm{BD}=x$ and $\displaystyle \tan \angle \mathrm{ACB}=\frac{1}{2}$, then :
Official answer
(3)
$\displaystyle x^2-2 \mathrm{a} x+\mathrm{b}(\mathrm{a}+\mathrm{b})=0$
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.