I don’t know and i understand that the other one didn’t do it but did you already try searching it?
ANSWER
114.52 meters per second
EXPLANATION
We have that the car covers a distance of 5726 meters in 50 seconds.
To find the speed, we have to use the formula for speed which is:

So, the unit rate of speed of the car is:

That is the unit rate of speed of the car in meters per second.
It is a ratio problem...
2 dogs need 144 feet = 2 : 144
Simplify the ratio = 1 : 72
Multiply both sides by 8 (8 dogs) = 1*8 :144*8
Simplify the ratio = 8 : 1152
8 dogs need 1152 feet of fencing
Hope this helps!
In the attachment this is how i did it! ~Best of Luck~