Ile gramów benzyny zawartych jest w 200 gramach ropy naftowej,jeżeli ropa zawiera 20 % benzyny ?
skoro ropa zawiera 20% benzyny to obliczamy 20% z 200 g
20% z 200 g= 20*200/100= 40 g
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skoro ropa zawiera 20% benzyny to obliczamy 20% z 200 g
20% z 200 g= 20*200/100= 40 g