mencari luas permukaan dan volume kak tolong di jawab .
LP 1 = Kerucut = T = 18 - 12 = 6 cm
r = d/2 = 14/2 = 7 cm
LP =
π × r × t + π × r × r = 22/7 × 7 × 6 + 22/7 × 7 × 7 =
924/7 + 1.078/7 = 132 + 154 = 286 cm²
LP 2 = Tabung = r = d/2 = 14/2 = 7 cm
LP = 2 × π × r × r + 2 × π × r × t =
2 × 22/7 × 7 × 7 + 2 × 22/7 × 7 × 12 =
2.156/7 + 3.696/7 = 308 + 528 = 836 cm²
LP. Gabungan = LP. 1 + LP. 2 = 286 + 836 =
1.122 cm²
V. 1 = Kerucut = T = 18 - 12 = 6 cm
r = d/2 = 14/2 = 7 cm
V = 1/3 × π × r × r × t = 1/3 × 22/7 × 7 × 7 × 6 =
6.468/21 = 308 cm³
V. 2 = Tabung = r = d/2 = 14/2 = 7 cm
V = π × r × r × t = 22/7 × 7 × 7 × 12 = 12.936/7 = 1.848 cm³
V. Gabungan = V. 1 + V. 2 = 308 + 1.848 =
2.156 cm³
[answer.2.content]
