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Verified answer
Volume kerucut= 1/3×π×r²×t= 1/3×22/7×7²×12
= 616 cm³
volume setengah bola= 1/2× 4/3× π×r³
= 1/2×4/3×22/7×7³
= 718,66
luas volme seluruhnya= 616+718,66= 1334,66 cm³.
maaf kalau salah....
tapi sih, ini betul jawabannya