A train running at a speed of 36 kmph crosses an electric pole in 12 seconds. In how much time will it cross a 340 m long platform? Choose the correct choice from the following answers:	A) 37 min	B) 46 min	C) 47 min	D) 67 min	E) 45 min
B   46 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 +340)/ 36 * 5/18 = 46 min.
<result>B</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 340 m long platform?