Runner story problem

Question

A 130 lb. person who runs at 6 mph for 1 hour burns about 720 calories . The same person, walking at 2 mph for 90 min burns about 240 calories. Suppose a 130-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

75 min=1.25 hr

1.25*720=900 calories

900/240=3.75 (90 min walks)

3.75*90=337.5 min

337.5/60=5.625 hr

distance=rate*time

distance=2*5.625

distance=11.25 mi