Question

In order to lose one pound, one must burn off about 3,500 calories. To burn off 100 calories, you must bicycle at 9 mph for 15 minutes. How long do you have to bicycle at 9mph to lose 3 pounds?

Answer 1

(3 lb) * (3500 cal/lb) * (15 min)/(100 cal) = 3*3500*15/100 min = 1575 min

You have to bicycle at 9 mph for 26 hours 15 minutes to lose 3 pounds.