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Verified answer
BANGUN RUANG SISI LENGKUNGJari-jari tabung = jari-jari kerucut = jari-jari bola = r = 3 dm
tinggi tabung = t = 9 dm
Garis pelukis = s = 5 dm
Luas permukaan bangun pada gambar
= Luas 1/2 bola + luas selimut tabung + luas selimut kerucut
= 1/2 . 4πr^2 + 2πrt + πrs
= 2πr^2 + 2πrt + πrs
= πr (2r + 2t + s)
= 3,14 . 3 (2(3) + 2(9) + 5)
= 9,42 (6 + 18 + 5)
= 9,42 (29)
= 273,18 dm^2