A passenger sitting in a train A moving at 90 ~km / h observes another train B moving in the opposite direction for 8 ~s. If the velocity of the train B is 54 ~km / h, then length of train B is:

Kinematics: JEE Main 2023 Physics question

JEE Main 2023 · 13 Apr, Evening shift · Q7877

JEE Main 202313 Apr, Evening shiftPhysicsMediumKinematics177× since 2002

A passenger sitting in a train A moving at

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

observes another train

\mathrm{B}

moving in the opposite direction for

8 \mathrm{~s}

. If the velocity of the train B is

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

, then length of train B is: