Two trains 'A' and 'B' of length '…' and '…' are travelling into a tunnel of length '…' in parallel tracks from opposite directions with velocities … and …, respectively. If train 'A' takes … less time than train 'B' to cross the tunnel then. length '…' of tunnel is : (Given … )

Option C. Let's start by converting the velocities of both trains to m/s:

Motion in a Straight Line

JEE Main 2023 · 13 Apr, Morning shift · Q7878

PhysicsHard65×since 2002Q7878

Two trains 'A' and 'B' of length '

l

' and '

4 l

' are travelling into a tunnel of length '

\mathrm{L}

' in parallel tracks from opposite directions with velocities

108 \mathrm{~km} / \mathrm{h}

and

72 \mathrm{~km} / \mathrm{h}

, respectively. If train 'A' takes

35 \mathrm{~s}

less time than train 'B' to cross the tunnel then. length '

L

' of tunnel is : (Given

\mathrm{L}=60 l

)

Motion in a Straight Line — JEE Main 2023 · 13 Apr, Morning shift · Q7878 · Alror