Answer:
The average car speed is 25.4 m/s
Step-by-step explanation:
The definition of average speed is the total distance traveled between the total time
Vm = dx/dt (1)
To be able to use this equation let's calculate the total carriage distance
Xt = X1 + X2
X1 = 10 miles 1609 m / 1 miles = 16090 m
X2 = 10 miles 1609 m / 1miles = 16090 m
XT = 32180 m
Now let's calculate the total time
v = d / t
t = d / v
t1 = x1 / v1
t2 = x2 / v2
t1 = 16090/22
t1 = 731.36 s
t2 = 16090/30
t2 = 536.33 s
t all = t1 + t2
t all = 731.36 +536.33
t all = 1267.69 s
Having these values we use the initial equation
Vm = d / t
Vm = 32180 /1267.69
Vm = 25.38 m / s
The average car speed is 25.4 m/s