At this rate, Anusha will walk 3 miles in an hour. You can find this in two ways, the first being simply multiplying the 3/4 by 4 because it is 1/4 of the destination time. You can also do 3/4 mile over 15 minutes and a variable of your choice over 60 minutes and cross multiply to get 15a=45. Next, divide 45 by 15 and you get "3," meaning 3 miles were traveled.