AFCAT Model Paper 1

Given:
Length of train = 125 m
Length of bridge = 62.5 m
Length of railway crossing = 75 m
Time to cross the bridge by train = 6 seconds
Formula Used:
Distance = Speed × Time
Calculation:
Time to cross bridge = (Length of train + Length of bridge)/Speed of train
⇒ 6 = (125 + 62.5)/Speed of train
⇒ Speed of train =

187.5

6

⇒

125

4

m/sec.
Similarly,
Time to cross railway crossing = (Lengths of train + railway crossing)/Speed of train
⇒ {

(125+75)

( 125 4 )

}
⇒

(200×4)

125

=

32

5

⇒ 6.4 seconds
∴ The time taken by train to cross the railway crossing is 6.4 sec.