A train of length 230 metres takes 58 seconds to cross a tunnel of length 60 metres. What is the speed of the train in km/hr?  Select the correct option:  A) 58 km/hr.  B) 60 km/hr.  C) 30 km/hr.  D) 18 km/hr.  E) None
Sol.   Speed = [230 + 60 / 58] m/sec = [290 /58 * 18/5] km/hr = 18 km/hr.   Answer 18 km/hr.
<result>D</result>
A train of length 230 metres takes 58 seconds to cross a tunnel of length 60 metres. What is the speed of the train in km/hr?