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Jari Jari (r) = 14 cm
Tinggi (t) = 15 cm
Ditanya : Luas selimut kerucut ?
Jawab :
~Cari panjang garis pelukis (s)~
s = √ (r² + t²)
s = √ (14² + 15²)
s = √ (196 + 225)
s = √ 421
s ≈ 20,5 cm
Jadi,
Luas selimut kerucut :
= π . r . s
= 22/7 x 14 cm x 20,5 cm
= 902 cm²
(Opsi B)
*Maaf apabila ada yangs salah*