A 150-lb person who runs at 6 mph for 1 hr burns about 720calories. The same per

A 150-lb person who runs at 6 mph for 1 hr burns about 720calories. The same person walking at 2 mph for 90 min burns about120 calories. Suppose a 150-lb person runs at 6 mph for 75 min. Howfar would the person have to walk at 2 mph in order to burn thesame number of calories as burned when running?