Walking at a brisk pace burns off about 280 Cal/h. How long would you have to walk to burn off the Calories obtained from eating a cheeseburger that contained 25 g of protein, 25 g of fat, and 31 g of carbohydrates? [Hint: One gram of protein or one gram of carbohydrate typically releases about 4 Calg, while fat releases 9 Cal/g.] hours​