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AFCAT II 2017 Solved Paper
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© examsnet.com
Question : 54
Total: 100
A train moving at a cover a rate of 90 kmph. Crosses a tunnelin 36 seconds. and other train which is 100 metres shortermoving at a cover a rate of 45 kmph. How much time will ittake to go through the tunnel?
54 seconds
64 seconds
50 seconds
58 seconds
Validate
Solution:
Speed of 1st train = 90km/hr =
90
×
5
18
=
25
m/sec
Time taken by 1st train = 36 seconds
∴ Distance = speed × time
=25×36=900m
Now2nd train is 100 meters shorter, then
∴ Distance (900 – 100) = 800m
Speed of 2nd train =
45
×
5
18
=
12.5
m/sec
∴ Time =
800
12.5
=
64
sec
© examsnet.com
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