Bantu jawabbb donggg

luas area kolam = 26 x 17 = 442 m^2
luas kolam = (26 - 4) x (17 -4)
= 22 x 13 = 286
luas jalan = 442 - 286 = 156 m^2
biaya = 156 x Rp 30.000,
= Rp 4.680.000,-...(B)