Answer:
B. 75 mph
Step-by-step explanation:
d - distance
v - velocity
t - time
d = 120 miles
t = 2 hrs
1st 60 miles :
[tex]v = \frac{d}{t} [/tex]
[tex]t = \frac{d}{v} [/tex]
[tex]t = \frac{60}{50} [/tex]
[tex]t = 1.2 \: hrs[/tex]
[tex]t = 1.2 \times 60[/tex]
[tex]t = 72 \: minutes[/tex]
2nd 60 miles:
It took 72 minutes for him to travel the first 60 miles. To get the remaining time:
[tex]t = 120 - 72[/tex]
[tex]t = 48 \: minutes[/tex]
[tex]t = 0.8 \: hrs[/tex]
For the Velocity:
[tex]v = \frac{d}{t} [/tex]
[tex]v = \frac{60}{0.8} [/tex]
[tex]v = 75 \: mph[/tex]
