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Pkuli = 4*πr²
p = 4* 3,14 * 2²
p= 12,56 * 4
p= 50,24cm²
r₁=40cm
p= 4 * πr²
p= 4 * 3,14 * 40²
p = 20094cm²
10kuli
10*20094cm²=200940cm²
200940cm² : 50,24cm² = 400
odp. Pomaluje sie 400kul.