It is possible to lose 20 pounds in 2 months. The average person following a diet and exercising can lose 2 to 3 pounds per week. Based on 8 weeks, this could mean about 24 pounds lost in 2 months time.
You cannot lose 2 pounds per day on a regular bases. However, if you lose pounds at a slower rate you can lose significant body fat and keep it off. For in-depth information about how to lose pounds, see the page link, further down this page, listed under Related Questions. .