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Verified answer
L = 1,54 dm² = 154 cm²L = π.r²
154 = 22/7 x r²
r² = 154 : 22/7
r² = 154 x 7/22
r² = 49
r = √49
r = 7 cm
D = 2 x r
D = 2 x 7 cm
D = 14 cm
Agar lebih mudah ubah desimal menjadi centimeter terlebih dahulu