tolong dong yang bisa
Jawaban:
[tex]500\pi \: {cm}^{3} [/tex]
Sekitar, 1570 cm³.
Penjelasan dengan langkah-langkah:
t : r= 4 : 1
t= 4r
Luas permukaan=
2 × pi × r(r+t)
Karena tanpa tutup:
225pi = 2 × pi × r(r+t) - pi × r²
[tex]225\pi = 2\pi{r}(r + 4r) - \pi {r}^{2} \\ 225\pi = 2\pi {r}^{2} + 8\pi {r}^{2} - \pi {r}^{2} \\ 225 \pi = 9\pi {r}^{2} \\ 25 = {r}^{2} \\ r = 5[/tex]
t= 4r
t= 4(5 cm)
t= 20 cm
V= pi × r² × t
V=
[tex]\pi \times {5}^{2} \times 20 \\ = \pi \times 25 \times 20 \\ = 500\pi[/tex]
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