An elephant walks 60 miles in 12 hours. What is the unit rate?
A. 4 miles per hour
B. 5 miles per hour
C. 6 miles per hour
D. 48 miles per hour
The unit rate is calculated by dividing the total distance (in miles) by the total time (in hours).
In this case, the elephant walks 60 miles in 12 hours, so the unit rate is $\frac{60}{12} = \boxed{\textbf{(A)}\ 4}$ miles per hour.
To find the unit rate, we need to divide the total distance traveled by the time taken. In this case, the elephant walked 60 miles in 12 hours. So, the unit rate is found by dividing 60 by 12.
Unit rate = Distance / Time
Unit rate = 60 miles / 12 hours
Unit rate = 5 miles per hour
Therefore, the correct answer is B. 5 miles per hour.