Answer:
15 miles
Step-by-step explanation:
Let
be the miles in the circular park path,
the time Louisa takes to finish and
the time Calvin takes to finish both in hours.
Then
, the longitude is equal to the velocity times the time used to finish. So


And the difference between Louisa's time and Calvin' time is 30 minutes, half an hour. So:

Three equations, three unknowns, the system can be solved.
Equalizing the equation with x :

In this last equation replace
with the other equation and solve:
With Louisa's time find x:
<u>At Hayden's:</u>
<u>At Austins:</u>

As we can see in both results, it would take them
(4 hours) for the prices to be equaled.
ANSWER:
◻ Rational no. —: Addition & Multiplication (Yes) and Subtraction & Division (No)
◻ Integers —: Addition & Multiplication (Yes) and Subtraction & Division (No)
◻ Whole no. —: Addition & Multiplication (Yes) and Subtraction & Division (No)
◻ Natural no. —: Addition & Multiplication (Yes) and Subtraction & Division (No)
It will take five hours and twenty five minutes