1. The length of the bridge, which a train 180 m long and travelling at 108 km/hr can cross in 20 seconds, is:
Solution:
Speed = 108*5/18
= 30 m/s.
30 = (180+x)/20
x = 600-180
= 420 m.
2. A train passes a platform in 24 seconds and a man standing on the platform in 10 seconds. If the speed of the train is 36 km/hr, what’s the length of the platform?
Solution:
Length of the train = 10*(36*5/18)
= 100 m.
(100+x)/24 = 36
x = 864- 100
= 764 m.
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