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= . 4 .π.d²
= .π.d²
= . .35.35
= 1.925 m²
Total biaya pengecatan
= 7.000 x 1.925
= Rp13.475.000,00
d = 35, maka r = 17,5
luas atap = 1/2 x π x r²
= 1/2 x 3,14 x 17,5²
= 480,8125 m²
maka total biaya = 480,8125 x 7000 = Rp. 3.365.688