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P = pi×r²/2 = 3.14 × 40²/2 = 2512m²
Jeden ar to 100m². Jeden worek wystarczy na 2 ary czyli 200m².
2512m² / 200m² = 12,56
Czyli trzeba kupic 13 workow.
P = 3.14 x 40²/2
P = 2512 m² - ok 25 ar
25 /2 =12 .5 -odp
π=3,14
3,14 x 1600m/2= 2512m²
1a = 100 m²
2512m²/100= 25,12a
25,12a/2 = 12,56
nalezy kupic 13 opakowan