Jawaban:
20cm.
Penjelasan dengan langkah-langkah:
[tex]V = \pi \times ( \frac{d}{2}) {}^{2} \times t \times \frac{1}{3} \\ = \pi \times \frac{ {d}^{2} }{4} \times t \times \frac{1}{3} \\ = \frac{\pi \times {d}^{2} \times t }{12} [/tex]
[tex]1570 = \frac{3.14 \times {d}^{2} \times 15 }{12} \\ 1570 \times 12 = 3.14 \times {d}^{2} \times 15 \\ 18840 = 3.14 \times {d}^{2} \times 15 \\ \frac{18840}{3.14 \times 15} = {d}^{2} \\ {d}^{2} = \frac{18840}{47.1} \\ {d}^{2} = 400 \\ d = \sqrt{400} \\ d = 20cm[/tex]
Report kalau salah.