IBPS PO Prelims Model Paper 7 with solutions

When a train crosses a platform it covers a distance equal to the sum of lengths of platform and train.
Let the length of platform be x metre.
∴ Speed of train =

x+280

60

=

280

20

=14
⇒ x + 280 = 60 × 14 = 840
∴ x = 840 – 280 = 560 metre