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P₁ = π * r²
P₁ = 3 * (2,5)²
P₁ = 3 * 6,25
P₁ = 18,75 cm²
Pole boczne:
P₂ = 2π * r * h
P₂ = 6 * 2,5 * 7
P₂ = 105 cm²
Pole całkowite:
P = 2P₁ + P₂
P = 37,5 + 105
P = 142,5 cm²
Pboczne=
Pcalkowite=2Pp+Pb
Pp=2,5*2,5*3=18,75
Pb=2*3*2,5*7=105
Pc= 2*18,75+105=142,5