Answer:
51.3 mph
Explanation:
First, we find the time.
1:15 pm - 10:30 am = 13:15 - 10:30 = 12:75 - 10:30 = 2:45
Now we convert 2:45 into a decimal number.
2:45 = 2 h + 45 min = 2 h + 45 min × (1 h)/(60 min) = 2.75 h
speed = distance/time
speed = 141 miles / 2.75 hours
speed = 51.272727... mph
Answer: 51.3 mph