SOLUTION: a closed box made of wood 1 cm thick, has external dimensions 20 cm by 15 cm by 10 cm. find the mass of the empty box if 1 cubic decimeter of wood weighs 1 kg?

Question 945422: a closed box made of wood 1 cm thick, has external dimensions 20 cm by 15 cm by 10 cm. find the mass of the empty box if 1 cubic decimeter of wood weighs 1 kg?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
If the box was solid,

Since it's not, subtract out the volume of the air space, by subtracting 1 cm from each side of each dimension.

So then,

Convert the volume to cubic decimeters using,

So then,

And finally,

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