- Find and simplify a formula for the surface area of the oval tank shown to the right.
- If the diameter is D = 2.5 meters and the length is L = 6.5 meters then what is the surface area in square feet?

- The formula for the surface area of the tank is:
We have discovered that the area is equal to the area of an open cylinder L units long (one with no ends).

- The surface area in square meters is
The surface area in square feet is