A train 400 m long can cross an electric pole in 20 sec and then find the speed of the train? Choose the correct choice from the following answers: A) 35 Km/hr B) 48 Km/hr C) 57 Km/hr D) 72 Km/hr E) 83 Km/hr
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 Km/hr multiply by 18/5)   Speed = 72 Km/hr   ANSWER:72 Km/hr
<result>D</result>
A train 400 m long can cross an electric pole in 20 sec and then find the speed of the train?