A train running at a speed of 36 kmph crosses an electric pole in 12 seconds. In how much time will it cross a 380 m long platform?	Choose one:	A) 50	B) 27	C) 29	D) 47	E) 28
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 +380)/ 36 * 5/18   = 50 min.   50nswer:50
<result>A</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 380 m long platform?