DIKETAHUI JIKA JARI JARI ALAS SEBUAH KERUCUT=12CM
TINGGI=5CM
VOLUME=3,14
BERAPAKAH LUASNYA?
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Caranya πr²+πrs
duh maaf saya tadi salah tadi saya pikir tabung
s² = 144 + 25
s = √169
s = 13 cm
Luas kerucut = πr (s+r)
= 3,14.12 (13+12)
= 37,68 (25)
= 942 cm²