IBPS Clerk Prelims Model Paper 5

Let the length of the train be x metres.
The train covers x metres in 8 seconds and (x + 180) metres in 20 seconds.
⇒

x

8

=

(x+180)

20

⇒ 20x = 8 (x + 180)
⇒ x = 120
Thus, the length of the train is 120 metres.
Therefore,
∴ Speed of the train =

120

8

m/sec
= 15 m/sec
= 54 km/hr
Hence, this is the required result.