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314 = 1/3 x 3,14 x 5 x 5 x t
314 x 3 = 3,14 x 25 x t
t = 942 : 78,5
= 12
314 = 1/3 x 3.14 x 5² x t
314 = 1/3 x 3.14 x 25 x t
314 x 3 = 3.14 x 25 x t
942 = 78.5 t
t = 942 : 78.5
t = 12 cm
jadi tinggi kerucut = 12 cm
b). garis pelukis (s)
s = √t² + r²
s = √12² + 5²
s = √144 + 25
s = √169 = 13 cm
jadi panjang garis pelukisnya adh 13 cm
c).Luas selimut (Ls)
Ls = πrs
Ls = 3.14 x 5 x 13
Ls = 204.1 cm²
d). Luas permukaan (Lp)
Lp = πr (r + s)
Lp = 3.14 x 5 (5 + 13)
Lp = 15.7 x 18
Lp = 282.6 cm²
oke siip.. jangan lupa ditandai sbg terbaik ya... hehehe