A train 250 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?  Answers:	A) 32	B) 28	C) 29	D) 44	E) 21

Rationale: "s = ( 250 + 300 ) / 45 = 550 / 45 * 18 / 5 = 44 answer : d"
Answer: D