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4 x π x r² = 154
4 x 22/7 x r² = 154
88/7 x r² = 154
r² = 154 x 7/88
r² = 12,25
r = √12,25
r = 3,5 cm
jawabannya 3,5 cm
4 x π x r² = 154
4 x 22/7 x r² = 154
88/7 x r² = 154
r² = 154 x 7/88
r² = 12,25
r = √12,25
r = 3,5 cm