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V=Pp*h
12000=120*h |:120
h=12000/120
h=100 cm
V=h*pp
12000=h*120
h=12000/120
h=100 cm
pp=120cm
1dm=10cm 1dm3=100cm3
v=Pole podstawy(pp) x wysokość graniastosłupa (h)
więc:
H= 12000:120=100cm sprawdzenie : 120x100=12000cm =12dm3
h = 100 cm
Wysokość wynosi 100 cm