The distance between the school and the library is 3 1/2 miles. The distance between the library and town hall is 1 1/4 miles. How many miles farther is it from the school to the library to town hall
To find the total distance from the school to the library and then to town hall, we add the distances together:
3 1/2 + 1 1/4 = 7/2 + 5/4 = 14/4 + 5/4 = 19/4 = <<19/4=4.75>>4.75 miles
So, it is 4.75 miles farther from the school to the library to town hall. Answer: \boxed{4.75}.