Question 251799
Simply set up the equation {{{4/30=x/72}}} where 'x' is the number of miles she runs in 72 minutes. Notice how the ratio of 4 to 30 is equal to the ratio of x to 72.



{{{4/30=x/72}}} Start with the given ratio



{{{(4/30)*72=x}}} Multiply both sides by 72



{{{288/30=x}}} Multiply



{{{48/5=x}}} Reduce.



So our answer is  {{{x=48/5}}} which in decimal form is {{{x=9.6}}} which means that she can run 9.6 miles in 72 minutes.