The length of the bridge, which a train 130 metres long and travelling at 45 km / hr can cross in 30...
The length of the bridge, which a train 130 metres long and travelling at 45 km / hr can cross in 30 seconds, is
Answer/Solution
245 m
Steps/Work
Sol.
Speed = [45x5/18] m/sec = (25/2)m/sec; Time = 30 sec.
Let the length of bridge be x metres.
Then, 130 + x / 30 = 25 / 2
⇔ 2(130 + x) = 750
⇔ x = 245 m.
Answer C
Speed = [45x5/18] m/sec = (25/2)m/sec; Time = 30 sec.
Let the length of bridge be x metres.
Then, 130 + x / 30 = 25 / 2
⇔ 2(130 + x) = 750
⇔ x = 245 m.
Answer C