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Density of Regular Solids

An iron block...

Question

An iron block having dimensions $2 m \times 2 m \times 3 m$ has mass of $24 k g$ . Calculate the density of the iron.

2 k g m^{- 3}

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1 k g m^{- 3}

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3 k g m^{- 3}

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4 k g m^{- 3}

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Solution

The correct option is A $2 k g m^{- 3}$
Given,
Mass of the block = $24 k g$
Volume of the block = $2 m \times 2 m \times 3 m$ = $12 m^{3}$
Density = $\frac{M a s s}{V o l u m e}$
Density of the iron = $\frac{24 k g}{12 m^{3}}$ = $2 k g m^{- 3}$

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