Vol. cylinder = 3 x 3 x 44 x p = 396 cm³

    vol. hemisphere = 4/3p x 3 x 3 x 3 x ½ = 18 cm³

(a)total vol. = 18 cm³ + 396 cm³ = 414 cm³

    vol. cement = 414p cm³/ 2 = 207p cm³ 

    vol. at cylinder = 20p cm³ - 18p cm ³ = 189p cm³

    height at cylinder = 189p cm³/9p = 21cm

(b)total height = 21 cm + 3 cm = 24 cm

    surface area cylinder = 6 x p x 21 = 126 cm²

    surface area hemisphere = 4p x 3 x 3 x ½ = 18p cm² 

(c)total surface area = 126p cm² + 18p cm² = 144p cm²