If ^@ D ^@ is a point on the side ^@AB^@ of ^@\Delta ABC^@ such that ^@AD:DB = 8:6^@ and ^@E^@ is a point on ^@BC^@ such that ^@DE || AC^@, find the ratio of the areas of ^@\Delta ABC^@ and ^@\Delta DBE^@.
A hall is in form of a right circular cylinder and cone as shown in the picture. The radius of cone and cylinder is 4 meters. The height of cylinder and cone are 8 meters and 3 meters respectively. Find the outer surface area of the hall. (Assume π =