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2/3 * 240 000 = 160 000cm3
b = 50cm = 5dm
c = 60cm = 6dm
Objętość akwarium:
V = 8dm×5dm×6dm = 240dm³
Ilość nalanej wody:
3/4V = 3/4×240dm³ = 180dm³ = 180l
Odp.: Do akwarium wlano 180l wody.
240000* 3/4=720000/4=180000