Answer:
C
Explanation:
We can use the formula
to solve this problem, easily.
Where
- t is the time in hours
- d is the distance in miles
- r is the rate/speed in mi/hr
First leg, distance is 377 miles (d=377) and rate is 58 mph (r=58), hence time is:

Second leg, distance is same (d=377) and the rate is 65 mph (r=65), hence time is:

Adding both the times:
6.5 hours + 5.8 hours = 12.3 hours (total time)
Answer choice C is right.