 
<translate> Dalili: Amsa = A. 20 mil Saurin dangantaka = 110 - 100 = mil 10 a kowace awa A cikin sa'o'i 6, bambanci = 10 * 6 = mil 60 Fast jirgin kasa trailing 40 mil, don haka tasiri bambanci = 60 - 40 = 20 mil <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 