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r=k/2π
=50,24/2 x 3,14
=8
Luas sisi atas
L1=πr²=3,14 x 8 x 8=200,96
Luas sisi lengkung
L2=keliling x tinggi =50,24x10=502,4
jumlah seluruhnya
L=L1+L2=200,96+502,4=703,36 cm²
Biaya yg dibutuhkan
Biaya=L x biaya per m
=703,36 x 30.000
=21.100.800