A train running at a speed of 36 kmph crosses an electric pole in 12 seconds. In how much time will it cross a 330 m long platform?  Choose the correct choice from the following answers.
A) 37 min B) 55 min C) 47 min D) 67 min E) 45 min
E   45 min   Let the length of the train be x m.   When a train crosses an electric pole, the distance covered is its own length.   So, x = 12 * 36 * 5 /18= 
<gadget id="calculator">12 * 36 * 5 /18</gadget>
<output>120</output>
120 m.   Time taken to cross the platform= (120 +330)/ 36 * 5/18 = 45 min.
<result>E</result>
A train running at a speed of 36 kmph crosses an electric pole in 12 seconds. In how much time will it cross a 330 m long platform?