Question: Two railway tracks are parallel to west-east direction. Along one track, train A moves a speed of 54km/h from west to east while along the second track train B moves with a speed of 90km/h from east to west. Find (i) relative velocity of ground w.r.t. B.
Speed of train - 90 km/h,
Speed of ground - 0 km/h,
Relative velocity of ground = (0-90)km/h east to west.
= -90km/h east to west.
= 90km/h west to east.
Therefore, Relative Velocity of Ground w.r.t Train = 90km/h west to east.