Final answer:
To find the total length of both walks, multiply the two given expressions and simplify.
Step-by-step explanation:
To find the total length of both walks, we need to multiply the two given expressions: (3/(8))km and ((x+1)/(3))km. To simplify the expression, we can multiply the numerators and denominators separately. This gives us: (3/(8))*(x+1)/(3) = (3(x+1))/(8*3) = (3(x+1))/24. Therefore, the simplified rational expression that describes the total length of both walks is (3(x+1))/24.