Răspuns :
40 m =400 dm
V =400*400*400=64000000dm^3 =64000000 litri =64000000kg
V =400*400*400=64000000dm^3 =64000000 litri =64000000kg
1dm³=1 l = 1kg ;
1m³ = 1000 l = 1000 kg ;
V(cubului)=40m*40m*40m=64000m³ = 64000 × 1000 = 64 000 000 kg
1m³ = 1000 l = 1000 kg ;
V(cubului)=40m*40m*40m=64000m³ = 64000 × 1000 = 64 000 000 kg