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35,2 = x 35,2 = 4mx3,6mx2,75m - 4,4
10/35,2 = 1,5/x
10x = 52,8/:10
x = 5,28l
Odp. Potrzeba 5,28 l farby.
2x2,75x4=22
19,8+22= 41,8 m²
41,8-4,4=37,4
10 m² ---- 1,5 l
37,4 m² ---- x
10x=1,5*37,4
x=5,61 l
odp. Potrzeba 5,61 l farby