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V = π × r² × h ÷ 3
1.57 = π × r² × 6 ÷ 3
1.57 × 3 = π × r² × 6
4.71 = 3.14 × r² × 6
4.71 = r² × 18.84
4.71 ÷ 18.84 = r²
0.25 = r²
√0.25 = r
0.5 = r
RTA:
radio = 0.5