IBPS Clerk Prelims Model Paper 22

Let, the speed of the ship be S1.
Length of the ship = 125 m
Speed of the fishing boat = S2 = 5 kmph = 1.39 m/sec
Relative speed = SR = S1 – S2 = S1 – 1.39
Time taken to cross each other = 10 sec
Relative speed = S1 – 1.39 = 12.5
S1 = (12.5 + 1.39) m/sec
S1 = 13.89 m/sec
S1 = 50 km/h