 
 <translate> In 8s the train crosses the pole and in 18 sec the train crosses one more stationary train
In 10 sec the train travels a distance of 400 mtrs
Speed = 400/10 = 40 m/s = 40 (3600/1000) = 40 * 18/5 = 144 kmph
The answer: (A). <ibo> N'ime sekọnd 8 ụgbọ oloko gafere osisi ahụ na sekọnd 18 ụgbọ oloko gafere ụgbọ oloko ọzọ na-akwụsị N'ime sekọnd iri, ụgbọ oloko ahụ na-aga njem dị mita 400. Ọsọ = 400/10 = 40 m/s = 40 (3600/1000) = 40 * 18/5 = 144 kmph Azịza ya bụ: (A). 