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 velocities 108 ~km / h and 72 ~km / h, respectively. If train 'A' takes 35 ~s less time than train 'B' to cross the tunnel then. length ' L ' of tunnel is: (Given L=60 l)

Kinematics: JEE Main 2023 Physics question

JEE Main 2023 · 13 Apr, Morning shift · Q7878

JEE Main 202313 Apr, Morning shiftPhysicsHardKinematics177× since 2002

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

)

JEE Main 2023 Kinematics Question with Solution (13 Apr Morning shift, Q7878) | JEE Arc