Perhatikan gambar! jika jari jari bola 12 cm, maka luas seluruh permukaan tabung....
ulfah0105
R bola = 12 cm r tabung = 12 cm t tabung = 2r = 2(12 cm) = 24 cm L tabung = 2.phi. r (r+t) = 2 × 3,14 × 12 cm (12 cm + 24 cm) = 75,36 cm (36 cm) = 2712,96 cm²
r tabung = 12 cm
t tabung = 2r = 2(12 cm) = 24 cm
L tabung = 2.phi. r (r+t)
= 2 × 3,14 × 12 cm (12 cm + 24 cm)
= 75,36 cm (36 cm) = 2712,96 cm²