IBPS SO Prelims Exam Model Paper 5

Given:
Speed of train A = 50 km/h
Train A overtakes train B in 7.5 hours
Formula used:
Time =

Distance

Speed

Calculation:
Let the speed of train B = x km/h
⇒ Distance travelled by train B in 5 hours = 5x km
⇒ Relative speed = (50 – x) km/h
⇒ 5x = 7.5 × (50 –x)
⇒ 5x = 375 – 7.5x
⇒ 5x + 7.5x = 375
⇒ 12.5x = 375
⇒ x = 30 km/hr
∴ Speed of train B = 30 km/h