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p1=π*12*12=144π
l=30 czyli r=15
p2=π*15*15=225π
144π/225π*100%=64%
Odp. Serem jest pokryte 64% pizzy
πr² ≈ 3,14 * 60² = 3,14 * 3600 = 11304 (cm²)
Pole sera:
πr² ≈ 3,14 * 24² = 3,14 * 576 = 1808,64 (cm²)
11304/1808,64 = 6,25%
100% - 6,25% = 93,75%
Dane:
l=30cm
r=15cm
π=3
P₁=πr²
P₁=3×15²
P₁=3×225
P₁=675cm²
Część pokryta serem:
Dane:
r=12cm
π≈3
P₂=πr²
P₂=3×12²
P₂=3×144
P₂=432cm²
Obliczamy procent:
432÷675×100%=64%
Odp: Pizza jest pokryta w 64% procentach serem.