AFCAT Model Paper 8

Calculation:
Let the length of the other train be ‘x’ m
Since The two trains are running in opposite directions
So, Their relative speed is the sum of their individual speeds
⇒ Relative speed = 84 + 78 = 162 km/hr =162×

5

18

=45 m/sec
Now, Time taken to cross each other = (Sum of their lengths) / (Their relative speed)
⇒7.2=

(170+x)

45

⇒ 170 + x = 324
⇒ x = 324 - 170 = 154 m
∴ The other train is 170 – 154 = 16 m smaller than the first train.