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a=0,8 m=8 dm
b=50 cm=5 dm
160 l= 160 dm³
160=8*5*h
160=40h
h=4 dm
V = abc
a =0,8m =8dm
b =50cm =5dm
c =?
160dm³ = 8dm × 5 dm × c
160 = 40 c | :40
c = 160 : 40 [dm³:dm²=dm]
c = 4dm
Odp: wysokośc akwarium ma 4dm wysokości.