Train A and train B are running on parallel
tracks in the opposite directions with speeds of
36 km/hour and 72 km/hour, respectively. A
person is walking in train A in the direction
opposite to its motion with a speed of 1.8 km/
hour. Speed (in ms
–1
) of this person as
observed from train B will be close to :
(take the
distance between the tracks as negligible)