A train 200 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?	Choose the correct choice from the following answers: A) 32 B) 28 C) 40 D) 27 E) 21
S = (200 + 300)/45 = 500/45 * 18/5= 
<gadget id="calculator">500/45 * 18/5</gadget>
<output>40</output>
40   Answer: 40
<result>C</result>
A train 200 meters long completely crosses a 300 meters long bridge in 45 seconds. What is the speed of the train is?