1]Find the time taken by a train 180 m long, running at 72 kmph,in crossing an electric pole.
a] 9 s b]8 s c]7 s d]6 s
Sol. Speed of the train = (72 x 5/18) m/sec = 20 m/sec.
Distance moved in passing the pole = 180 m.
Required time taken = (180/20) sec = 9 sec.
2]In what time will a train 100 m long cross an electric pole,if its speed be 144 km/hr?
a] 2.5 s b]4.25 s c]5 s d]12.5 s
a] 9 s b]8 s c]7 s d]6 s
Sol. Speed of the train = (72 x 5/18) m/sec = 20 m/sec.
Distance moved in passing the pole = 180 m.
Required time taken = (180/20) sec = 9 sec.
2]In what time will a train 100 m long cross an electric pole,if its speed be 144 km/hr?
a] 2.5 s b]4.25 s c]5 s d]12.5 s
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