Subject
Quantitative Aptitude
Topic
Speed & Distance
The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:
ক)
200 mখ)
225 mগ)
245 mঘ)
250 mExplanation
Speed = (45 x (5/18)) 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.Related questions
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