A train 400 m long can cross an electric pole in 20 sec and then find the speed of the train?  Choices.
A) 16
B) 55
C) 72
D) 88
E) 12
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: 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?