DieselShip's Online Content Library

Q9. (a) (i) Determine the mass of a hemispherical copper container whose external and internal diameters are 28 cm and 26 cm respectively. (4)

Note: Copper weighs 8.9 × 10³ kg per m³.

(ii) The entire surface of the container is given a protective coating.

Determine the total surface area to be covered. (4)

(b) Fig Q9(b) represents a regular pentagon of side 200 mm.

Calculate the shaded area. (8)