Question

Two trains of lengths 100 meters and 80 meters are moving in the same direction at speeds
of 80 km/hr. and 60 km/hr. respectively. The time taken by the first train to cross the second
train is (in seconds)
(1) 16.2
(2) 28.2
(3) 32.4
(4) 40.8

Answer 1

32.4
Solve by relative velocity