A train of length 180 metres takes 54 seconds to cross a tunnel of length 270 metres. What is the speed of the train in km/hr?
Choose the correct choice from the following answers.
A) 50 km/hr.  B) 20 km/hr.  C) 30 km/hr.  D) 40 km/hr.  E) None
Sol.   Speed = [180 + 270 / 54] m/sec = [450 / 54 * 18/5] km/hr =30 km/hr.   Answer 30 km/hr.
<result>C</result>
A train of length 180 metres takes 54 seconds to cross a tunnel of length 270 metres. What is the speed of the train in km/hr?