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64 phi cm2 = phi x r2
r = √64
r = 8 cm
jadi, jari jari (r) = 8 cm
LSK (Luas Selimut Kerucut) = phi x r x s
163 phi cm2 = phi x 8 cm x s
163 = 8s
s = 163/8
s = 2,375
jadi, sisi miring = 2,375 cm
tinggi kerucut(pangkat 2) = 2,375 pangkat 2 - 8 pangkat 2
tinggi = √hasil di atas