A piece of wood is $3 m$ long, $2 m$ wide, and has a thickness of $1 m$ . Find its density, if the wood's mass is $2 k g$ .

0.3 k g m^{- 3}

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3 k g m^{3}

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0.33 k g m^{- 3}

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3.33 k g m^{3}

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Solution

The correct option is C $0.33 k g m^{- 3}$
Volume of the wood $= 1 m \times 2 m \times 3 m = 6 m^{3}$

Density of wood, $d_{w} = \frac{Mass of wood}{Volume of wood}$

$d_{w} = \frac{2 k g}{6 m^{3}} = 0.33 k g m^{- 3}$

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