Answer:
4 miles
Explanation:
the data we have is:
Miles Minutes
6 ⇒ 90
and the thing we want to know is how many miles she could walk in 60 minutes:
Miles Minutes
6 ⇒ 90
x ⇒ 60
where the x represents the unknown number of miles she will walk in 60 minutes.
we solve this problem using rule of three, for this we multiply cross quantities (6 by 60) and then we must divide by 90:
x = 6*60/90
x = 360/90
x = 4
in 60 minutes she walks 4 miles.