A train of length 250 metres takes 45 seconds to cross a tunnel of length 350metres. What is the speed of the train in km/hr?	Choose the correct answer:	A) 10 km/hr.	B) 240 km/hr.	C) 30 km/hr.	D) 24 km/hr.	E) None
Sol.   Speed = [250 + 350/ 45] m/sec = [600 / 45 * 18/5] km/hr = 24 km/hr.   Answer 24 km/hr.
<result>D</result>
A train of length 250 metres takes 45 seconds to cross a tunnel of length 350metres. What is the speed of the train in km/hr?