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Bantu jawab jangan ngasal

8. L.bola = 138600 cm²

L = 4π r²

$138600 = 4. frac{22}{7} .r {}^{2} \ 138600 = frac{88}{7} .r {}^{2} \ r {}^{2} = 138600. frac{7}{88} \ r {}^{2} = 11025 \ r = sqrt{11025} = 105 : cm$

V = 4/3. π r³

$frac{4}{3} . frac{22}{7} .105 . : 105 . : 105 \ =4851000 : cm {}^{3} (b.)$