he internal height of the cylinder is 7m and the internal radius is 3.

1.	he internal height of the cylinder is 7m and the internal radius is 3.5 m. Calculate:The total area of the internal surface, excluding the base,(i)(ii)14The internal volume of the container in m3.
Answer» (i) Total area of the internal surface of the container excluding the base =Area of the internal curved surface of the cylinder + Area of the internal surface of the hemisphere = {2π × 3.5 × 7 × (3.5)^2} m^2= 2π × 3.5 (7 + 3.5) m^2= 231 m^2 (ii). The internal volume of the container = Volume of the cylinder + volume of the hemisphere = {π × (3.5)^2× 7 + (2/3)π × (3.5)^3} m^3= (1078/3) m^3= 359.3 m^3

he internal height of the cylinder is 7m and the internal radius is 3.5 m. Calculate:The total area of the internal surface, excluding the base,(i)(ii)14The internal volume of the container in m3.

Answer»

(i) Total area of the internal surface of the container excluding the base

=Area of the internal curved surface of the cylinder + Area of the internal surface of the hemisphere

= {2π × 3.5 × 7 × (3.5)^2} m^2= 2π × 3.5 (7 + 3.5) m^2= 231 m^2

(ii). The internal volume of the container = Volume of the cylinder + volume of the hemisphere

= {π × (3.5)^2× 7 + (2/3)π × (3.5)^3} m^3= (1078/3) m^3= 359.3 m^3