Question

A train running at the speed of 120km/hr crosses a pole in 12 seconds. What is the length of the train

Answer 1

Obviously for the question , you have to assume that the train's engine/head is at the pole. And after 12 seconds , the tail of the train crosses it .

So the length of train = distance covered by train in 12s

= 12/3600 * 120 = 1/300 * 120 = 12/30 = 4/10 = 0.4 km = 400m

Answer 2

please see the attachment.the answer is 400 m.