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RUMUS SELIMUT KERUCUT
dimana r = jari-jari lingkaran
s = sisi miring kerucut
Diketahui: s besar= 12 + 8 = 20 cm
s kerucut kecil= 8 cm
r besar = 14 cm
r kecil = 7cm
1. Luas selimut kerucut besar
2. Luas selimut kerucut kecil
Luas yang diperlukan = 880 - 176 = 704 cm^2
= 22/7 x 14 x (12+8) - 22/7 x 7 x 8
= 44 x 20 - 22 x 8
= 880 - 176
= 704 cm²
big thanks to Kak irwandaa7