Q.Sebuah bola memiliki diameter 42 cm. Tentukan volume dan luas permukaan nya ! .... Question from @nxyaptrf

nxyaptrf @nxyaptrf

May 2022 2 32 Report

Q.

Sebuah bola memiliki diameter 42 cm. Tentukan volume dan luas permukaan nya !

XxDarknessxX

Volume Bola

4/3 × πr³

4/3 × 22/7 ( 42 ÷ 2 )²

4/3 × 22/7 ( 21 )³

4/3 × 22/7 × 21 × 21 × 21

4 × 22 × 7 × 3 × 21

88 × 21 × 21

88 × 441

38.808 cm³

Luas Permukaan

4πr²

4 × 22/7 × ( 42 ÷ 2 )²

4 × 22/7 × ( 21 )²

4 × 22/7 × 21 × 21

4 × 22 × 3 × 21

88 × 63

5.544 cm²

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2 votes Thanks 3

nxyaptrf makasih kaa

XxDarknessxX yup

HayabusaBrainly01

Penjelasan dengan langkah-langkah:

Volume

$v = \frac{4}{3} \times \pi \times {r}^{3} \\ v = \frac{4}{3} \times \frac{22}{7} \times ( \frac{42}{2} cm) {}^{3} \\ v = \frac{4}{3} \times \frac{22}{7} \times (21cm) {}^{3} \\ v = 4 \times 22 \times (21cm) {}^{2} \\ v = 88 \times 441 {cm}^{2} \\ v = \bf38.808{cm}^{3}$

$\:$

Luas Permukaan

$Lp = 4 \times \pi \times {r}^{2} \\ Lp = 4 \times \frac{22}7 \times (21cm) {}^{2} \\ Lp = 4 \times 22 \times 3cm \times 21cm \\ Lp = 88 \times {63cm}^{2} \\ Lp = \bf5.544 {cm}^{2}$

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