 
<translate> Amsar = A. 60 mil Saurin dangantaka = 130 - 100 = 30 mil a kowace awa A cikin sa'o'i 3, bambanci = 30 * 3 = mil 90 Fast jirgin kasa trailing 30 mil, don haka tasiri bambanci = 90 - 30 = 60 mil Amsar ƙarshe: (A). <eng> 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). 