24 minutes. When an adult runs, one step is about 0.6 meters, so there are: 0.6 meters/step ×7000 steps =4200 meters. Because 1 000m is equal to1km, and 4200m is equal to 4.2km. Assuming the running speed is 3m per second, the time required to run 7000 steps through the speed formula V=S/t is: 4200m ÷ 3m per second =1400s. 1400s/60s =24 (minutes).