 
 <translate> Answer = A. 60 miles
Relational speed = 130 - 100 = 30 miles per hour
In 3 hours, difference = 30 * 3 = 90 miles
Fast train trailing 30 miles, so effective difference = 90 - 30 = 60 miles
The final answer: (A). <ibo> Azịza = A. 60 kilomita Relational ọsọ = 130 - 100 = 30 kilomita kwa awa N'ime awa atọ, ọdịiche = 30 * 3 = 90 kilomita Ụgbọ oloko na-agba ọsọ ọsọ na-agbada kilomita iri atọ, ya mere ọdịiche dị irè = 90 - 30 = kilomita iri isii Azịza ya bụ: (A). 