Kool_SRG Posted June 6, 2018 Report Posted June 6, 2018 10 minutes ago, SonaParv_522 said: A person sees a train passing over 3km long bridge. The length of the train is half that of bridge if the train clears the bridge in 4mins. What is the speed of the train ? 45 Kmph.. Quote
Ara_Tenkai Posted June 6, 2018 Report Posted June 6, 2018 14 minutes ago, SonaParv_522 said: A person sees a train passing over 3km long bridge. The length of the train is half that of bridge if the train clears the bridge in 4mins. What is the speed of the train ? 67.5Kmph Quote
SonaParv_522 Posted June 6, 2018 Author Report Posted June 6, 2018 3 minutes ago, Ara_Tenkai said: 67.5Kmph right answer!!!! Quote
Spartan Posted June 6, 2018 Report Posted June 6, 2018 1 minute ago, SonaParv_522 said: right answer!!!! uncle 66.6kmph kada... nenu vesina solution wrong aa aite length of the bridge = 3000m length of train = 1500m total distance covered on bridge = 3000 + 1500 = 4500m time taken = 4min = 240sec speed = distance/time = 4500/240 = 18.5 m/s = 66.6 kmph Quote
Kool_SRG Posted June 6, 2018 Report Posted June 6, 2018 7 minutes ago, Ara_Tenkai said: 67.5Kmph Can you explain this... Quote
SonaParv_522 Posted June 6, 2018 Author Report Posted June 6, 2018 9 minutes ago, Spartan said: length of the bridge = 3000m length of train = 1500m total distance covered on bridge = 3000 + 1500 = 4500m time taken = 4min = 240sec speed = distance/time = 4500/240 = 18.5 m/s = 66.6 kmph length = track length + train length which is 4.5km time = 4min = 4*1/60hr speed = distance/time speed = 4.5/(4/60) km/hr = 67.5km/hr Quote
Spartan Posted June 6, 2018 Report Posted June 6, 2018 4 minutes ago, SonaParv_522 said: length = track length + train length which is 4.5km time = 4min = 4*1/60hr speed = distance/time speed = 4.5/(4/60) km/hr = 67.5km/hr mari meters lo lekkedite teda kottindi enduku... same numbers right only metric different. we multiply m/s with 18/5 to convert into kmph . ade vaada nenu.. Quote
SonaParv_522 Posted June 6, 2018 Author Report Posted June 6, 2018 what percent is 2min59seconds of an hour? Quote
Spartan Posted June 6, 2018 Report Posted June 6, 2018 2 minutes ago, SonaParv_522 said: what percent is 2min59seconds of an hour? 29.3 % Quote
SonaParv_522 Posted June 6, 2018 Author Report Posted June 6, 2018 12 minutes ago, Spartan said: uncle 66.6kmph kada... nenu vesina solution wrong aa aite length of the bridge = 3000m length of train = 1500m total distance covered on bridge = 3000 + 1500 = 4500m time taken = 4min = 240sec speed = distance/time = 4500/240 = 18.5 m/s = 66.6 kmph 4500met = 4.5 km 240sec = 240/3600hrs then do your math Quote
SonaParv_522 Posted June 6, 2018 Author Report Posted June 6, 2018 2 minutes ago, Spartan said: 29.3 % wrong answer Quote
SeemaLekka Posted June 6, 2018 Report Posted June 6, 2018 Just now, SonaParv_522 said: wrong answer 4.97 Quote
Ara_Tenkai Posted June 6, 2018 Report Posted June 6, 2018 16 minutes ago, Spartan said: uncle 66.6kmph kada... nenu vesina solution wrong aa aite length of the bridge = 3000m length of train = 1500m total distance covered on bridge = 3000 + 1500 = 4500m time taken = 4min = 240sec speed = distance/time = 4500/240 = 18.5 m/s = 66.6 kmph 4 u are right but 4500/240 is 18.75 Quote
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