Jawab: D
(cari garis pelukis kerucut dahulu)
s² = 12² + 5²
s² = 144 + 25
s² = 169
s = √169
s = 13 cm
Lp gabungan = L selimut kerucut + L 1/2 bola
= (πrs) + (1/2 x 4πr²)
= (3,14 x 5 x 13) + (1/2 x 4 x 3,14 x 5 x 5)
= 204,1 + 157
= 361,1 cm²
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Jawab: D
(cari garis pelukis kerucut dahulu)
s² = 12² + 5²
s² = 144 + 25
s² = 169
s = √169
s = 13 cm
Lp gabungan = L selimut kerucut + L 1/2 bola
= (πrs) + (1/2 x 4πr²)
= (3,14 x 5 x 13) + (1/2 x 4 x 3,14 x 5 x 5)
= 204,1 + 157
= 361,1 cm²