A train of length 150 metres takes 5 seconds to cross a tunnel of length 300 metres. What is the speed of the train in km/hr?
সমাধান
সঠিক উত্তর: Option C
Speed = Distance/Time
= (150 + 300)/40.5 m/sec= 450/40.5 X (3600/1000)km/hr = 40