bantu jwb no.7-9 ya yg bisa. makasih.

V = V kerucut - V tabung
= 4/3 × πr³ - ⅓ × πr²t
= 4/3 × 22/7 × 4.5 × 4.5 × 4.5 - ⅓ × 22/7 × 4.5 × 4.5 × 14
= 381,857 - 297
= 84,857 cm³