A train of length 150 metres takes 40.5 seconds to cross a tunnel of length 300 metres. What is the speed of the train in km/hr?

A train of length 150 metres takes 40.5 seconds to cross a tunnel of length 300 metres. What is the speed of the train in km/hr? Correct Answer 40

Speed, ( 150 + 300)/40.5 = 450/40.5 m/sec = 450/40.5 × 18/5 km/hr = 40 km/hr
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