Calories burned

Question

A 140 ​-lb person who runs at 6 mph for 1 hr burns about 720 calories. The same​ person, walking at 2 mph for 90​ min, burns about 240 calories. Suppose a ​140-lb person runs at 6 mph for 75 min. How far would the person have to walk at 2 mph in order to burn the same number of calories as burned when​ running?

Answer 1

6 miles running burns720 calories, 1 mile running burns 720/6 = 120 caloriws

6.25 miles running miles burns 720+120/4 =750 calories

walking 2x1.5= 3 miles burns120 caloties,walking 1 mile burns120/3 = 40 calories

walking 750/40= 18.75 miles burns750 calories

answer: 18.75 miles