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1386 = 4 x 22/7 x r²
1386 = 88/7 x r²
1386 x 7/88 = r²
110.25 = r²
r = 10.5 cm
Volume bola = 4/3 πr³
= 4/3 x 22/7 x 10.5 x 10.5 x 10.5
= 4851 cm³