A train 100 meters long completely crosses a 300 meters long bridge in 12 seconds. What is the speed of the train is?  Answers:
A) 32 kmph  B) 76 kmph  C) 120 kmph  D) 43 kmph  E) 40 kmph
S = (100 + 300)/12   = 400/12 * 18/5= 
<gadget id="calculator">400/12 * 18/5</gadget>
<output>120</output>
120   Answer:120 kmph
<result>C</result>
A train 100 meters long completely crosses a 300 meters long bridge in 12 seconds. What is the speed of the train is?