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jari jari(r) = 7 cm
t. tabung = 12 cm
t. keseluruhan = 36 cm
tanya : L. selimut kerucut ?
jawab:
tinggi kerucut
= tinggi keseluruhan - t. slinder
= 36 cm - 12 cm
= 24 cm
panjang garis pelukis (s)
= √(r² + t²)
= √(7² + 24²)
= √ (49 + 576)
= √ 625
= 25 cm
luas selimut kerucut
= π x r x s
= 22/7 x 7 cm x 25 cm
= 22 x 25
= 550 cm²
===> jawaban D
"maaf kalau salah"