Answer:
45 miles per hour is the answer. The unit rate (r) is calculated by dividing the number of miles (d) by the number of hours (t): r = d/t. We know that d equals 135 miles and t equals 3 hours. The unit rate is thus r = 135 miles/3 hours. r is equal to 135/3 miles per hour. r equals 45 miles per hour. 45 miles per hour is the unit rate. I hope this was helpful. Please let me know if you require any extra assistance!
Explanation: