Matematika 5. Perhatikan bangun berikut inil 15 cm 16 m 20 cm Volume bangun ruang gabungan tersebut adalah....cmpake cara kak​

courtneyschillerulv – April 03, 2023

5. Perhatikan bangun berikut inil 15 cm 16 m 20 cm Volume bangun ruang gabungan tersebut adalah....cm


pake cara kak​

Jawaban:

Volume tabung

[tex] = \pi {r}^{2} t \\ = 3.14 \times 7.5 \times 7.5 \times 20 \\ = 3.14 \times 56.25 \times 20 \\ = 3 \: 525.5 \: {cm}^{3} [/tex]

Volume kerucut

[tex] = \frac{1}{3} \pi {r}^{2} t \\ = \frac{1}{3} \times 3.14 \times 7.5 \times 7.5 \times 15 \\ = \frac{1}{3} \times 176.625 \times 15 \\ = 176.625 \times 5 \\ = 883.125 \: {cm}^{3} [/tex]

volume bangun ruang gabungan

= volume tabung + volume kerucut

[tex] = 3 \: 525.5 + 883.125 \\ = 4 \: 408.625 \: {cm}^{3} [/tex]

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