in order to lose 1 pounds one, must burn off 3500 calories. To burn off 100 calories you must bicycle at 9 mph for 15 minutes. How long do you have to bicycle at 9 mph to lose 7 ponds?
To burn off one pound, 100 cal * x = 3500 x= 35 You'll need 35 15 minutes to burn off one pound so, 525 minutes per pound, and you need to lose 7 pounds so, 525*7 = 3675 minutes OR 61.25 hours
