Physics · 2023
JEE Main · 13 April 2023, Shift 1 · Q32
Two trains ' A ' and ' B ' of length ' l ' and ' 4 l ' are travelling into a tunnel of length ' L ' in parallel tracks from opposite directions with…
Two trains ' A ' and ' B ' of length ' $\displaystyle l$ ' and ' $\displaystyle 4 l$ ' are travelling into a tunnel of length ' L ' in parallel tracks from opposite directions with velocities $\displaystyle 108 \mathrm{~km} / \mathrm{h}$ and $\displaystyle 72 \mathrm{~km} / \mathrm{h}$, respectively. If train ' A ' takes $\displaystyle 35$ s less time than train ' B ' to cross the tunnel then, length ' L ' of tunnel is :
(Given $\displaystyle \mathrm{L}=60 l$ )
Official answer
From NTA’s final answer key for this paper.
(1)
$\displaystyle 1800$ m
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JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.