Aquarium

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?

Result

m =  160 kg

Solution:

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

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