A train of length 250 m crosses a bridge of length 180m in 20 seconds. What is the speed of train?	Choices
A) 33 B) 77.4 C) 25 D) 22 E) 72
Sol : (length of train+ length of bridge) = speed of train x Time   (250+180) = 20 x Speed   Speed = 430/20= 
<gadget id="calculator">430/20</gadget>
<output>43/2 = around 21.5</output>
21.5 m/s=77.4 km/h   ANSWER=77.4
<result>B</result>
A train of length 250 m crosses a bridge of length 180m in 20 seconds. What is the speed of train?