5. Perhatikan bangun berikut inil 15 cm 16 m 20 cm Volume bangun ruang gabungan tersebut adalah....cm
pake cara kak
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]
[tex]\colorbox{FAFAD2}{\tt{\colorbox{EE82EE}{✿\:Riskafrebianti\:(RiBel)\:✿}}}[/tex]
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