Answer: 40.5 miles
Step-by-step explanation:
1 hour 20 minutes = 80 minutes
1 hour = 60 minutes
We can use proportions to set up and solve an equation:
[tex]54/80 = x/60[/tex]
[tex]x = (54 * 60)/80[/tex]
[tex]x = 3240/80[/tex]
[tex]x = 40.5[/tex]
Therefore Nathan's rate is 40.5 miles/hour.