tolong bgt bsk dikumpul
Jawab:
bangun ruang
1/2 bola dan kerucut
bola
r= AB = 6 cm
kerucut
r = AB = 6 cm
t = TA = 8 cm
s = √t²+ r² = √(6²+8²) = √100
s = 10 cm
Luas benda = luas 1/2 bola + luas selimut kerucut
L = 2π r² + π r s
L = π r ( 2r+ s)
L = 3,14 x 6 { 2x6 + 10 }
L= 3,14 x 6 x 22
L = 414, 48 cm²
1kaleng Vol cat = 220 cm²
banyak cat = L/V
n = 414,48 /220
n = 1,884 = 2 kaleng
