I have an aquarium that is 100 cm long and 40 cm wide and 40 cm in height. We fill it with water. How much will it weigh?

Correct result:

m =  160 kg


a=100 cmdm=100/10 dm=10 dm b=40 cmdm=40/10 dm=4 dm c=40 cmdm=40/10 dm=4 dm  V=a b c=10 4 4=160 dm3  h=1 kg/dm3  m=h V=1 160=160 kga=100 \ cm \rightarrow dm=100 / 10 \ dm=10 \ dm \ \\ b=40 \ cm \rightarrow dm=40 / 10 \ dm=4 \ dm \ \\ c=40 \ cm \rightarrow dm=40 / 10 \ dm=4 \ dm \ \\ \ \\ V=a \cdot \ b \cdot \ c=10 \cdot \ 4 \cdot \ 4=160 \ \text{dm}^3 \ \\ \ \\ h=1 \ \text{kg/dm}^3 \ \\ \ \\ m=h \cdot \ V=1 \cdot \ 160=160 \ \text{kg}

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