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100% - 58%= 42%
100% - x
42% - 6,3kg
x=100% * 6,3kg / 42%
x=630kg/42
x=15 kg
Odp: Z 15kg jabłek otrzymano 6,3kg jabłek
1 - x
0,42x = 6,3 /:0,42
x = 15 kg
a = 7cm
d = 7√2 cm
r = 7√2/2 cm
l = 2πr
l = 2*π* 7√2/2
l=7√2π cm
pzdr ;)