Answer:
Step-by-step explanation:
Use KCF method
Keep the first fraction
Change division to multiplication
Flip the second fraction.
÷ 

I think the ans should be D
Answer: The same trip will require 3.8 hours.
Step-by-step explanation:
Since we have given that
Time = 
Speed = 55 mph
So, distance would be

If the speed limit = 65 mph
So, time will be

Hence, the same trip will require 3.8 hours.