Hitunglah luas dan volumenya! beserta dengan cara penyelesaiannya!
Jawaban:
[tex]diameter \: = \sqrt{ {s}^{2} + {s}^{2} } \\ d \: = \sqrt{ {20}^{2} + {20}^{2} } \\ d = \sqrt{800 } \\ d = \sqrt{400 \times 2 } \\ d = 20 \sqrt{2} \\ \\ maka \: r = \frac{d}{2} = 10 \sqrt{2} [/tex]
[tex]L = 4\pi {r}^{2} \\ L = 4 \times 3.14 \times (10 \sqrt{2} {)}^{2} \\ L = 12.56 + 200 = 212.56 {cm}^{2} [/tex]
[tex]v = vbola \: - \: vkubus \\ v = \frac{4}{3} \pi {r}^{3} - {s}^{3} \\ v = \frac{4}{3} \times 3.14 \times (10 \sqrt{2} {)}^{3} - {20}^{3} \\ v = 4.19 \times 2000 \sqrt{2} - 8000 \\ v = 11851 - 8000 = 3851 {cm}^{3} [/tex]
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