Ответ:
1)
V=abc
c=V:ab
84000:(70*20)=84000:1400=60
2)c=V:ab
360:(8*5)=360:40=9
3)c=V:ab
720000:(90*50)=160
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Ответ:
1)
V=abc
c=V:ab
84000:(70*20)=84000:1400=60
2)c=V:ab
360:(8*5)=360:40=9
3)c=V:ab
720000:(90*50)=160