tolong dijawab secepatnya

a) V. bola= 4/3.πr³
=4/3. 3,14. 30³
=4/3. 3,14. 30.30.30
= 4. 3,14. 30.30.10
= 3,14. 120. 300
= 3,14. 36000
= 113040 cm³
b) Lp. bola = 4πr²
= 4. 3,14. 30²
= 12,56 .900
= 11304 cm²

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