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d = 1,4 cm, r = 1/2×d = 1/2×1,4 = 0,7 cm
t bangun = 4,2 cm
Dit :
Luas Permukaan Bangun = ?
Jwb :
》Luas 1/2 Bola = 2×phi×r^2 = 2×3,14×0,7^2 = 3.0772 cm2
》Luas Tabung = 2×phi×r×(r+t) = 2×3,14×0,7×(0,7+4,2) = 21.5404 cm2
》Luas Bangun = 3.0772 + 21.5404 = 24.6176 cm2