A train 400 m long can cross an electric pole in 20 sec and then find the speed of the train?
Choose one:	A) 34	B) 56	C) 72	D) 35	E) 32
Length = Speed * time   Speed = L/T   S = 400/20= 
<gadget id="calculator">400/20</gadget>
<output>20</output>
20 M/Sec   Speed= 20*18/5 (To convert M/Sec in to Kmph multiply by 18/5)   Speed = 72 Kmph   Answer: Option 72
<result>C</result>
A train 400 m long can cross an electric pole in 20 sec and then find the speed of the train?