Odpowiedź :
Vr= 0,3 dm3=300 cm3
dr= 1,5 g/cm3
Cp= 70%
dr=mr÷Vr
mr= dr*Vr
mr= 1,5 g/cm3*300 cm3=450 g
Cp= (ms÷mr)*100%
Cp*mr=ms*100%
ms= (Cp*mr)÷100%
ms= ( 70%*450 g)÷100%
ms= 315 g
Vr= 0,3 dm3=300 cm3
dr= 1,5 g/cm3
Cp= 70%
dr=mr÷Vr
mr= dr*Vr
mr= 1,5 g/cm3*300 cm3=450 g
Cp= (ms÷mr)*100%
Cp*mr=ms*100%
ms= (Cp*mr)÷100%
ms= ( 70%*450 g)÷100%
ms= 315 g