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= 2 π r + sisi
= 2. 22/7 . 14 + 14
= 88 + 14
= 102 meter
b. L Persegi = 28 x 28 = 784 m²
L O = π . r r = 22/7 14 . 14 = 22 x 28 = 616 m²
L persegi - L O = 784-616 = 168 m²
Alokasi anggran biaya = (L persegi-L O) 50000 + 250000
= 168.50000+250000
= 8400000+250000
= Rp. 8.650.000,-