 
<translate> Ihe kpatara ya: Azịza ya bụ A. Ọ dị kilomita iri abụọ na ise Relational ọsọ = 110 - 100 = 10 kilomita kwa awa N'ime awa isii, ọdịiche = 10 * 6 = 60 kilomita Ụgbọ okporo ígwè na-agba ọsọ ọsọ na-aga n'ihu na 40 kilomita, ya mere ọdịiche dị irè = 60 - 40 = 20 kilomita <eng> Reasoning: Answer = A. 20 miles
Relational speed = 110 - 100 = 10 miles per hour
In 6 hours, difference = 10 * 6 = 60 miles
Fast train trailing 40 miles, so effective difference = 60 - 40 = 20 miles 