Question

A piece of iron has a volume of 45cm^3 and a mass of 315 g. What is its density.

Answer 1

Required Answer:-

Given that,

• Volume of iron = 45 cm³
• Mass of iron = 315 g.

To Find :

• The density of a piece of iron.

Solution :

★ Knowledge required :

For calculating the density of an object, formula is given by :-

• $\underline{\boxed{ \sf{Density} = \dfrac{Mass}{Volume} }}$

Here,

• Mass of the object = 315 g.
• Volume of the object = 45 cm³

Inserting the values,

⇒ Density of iron = 315/45

⇒ Density of iron = 7 g/cm³

Therefore, the density of a piece of iron is 7 g/cm³.

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Knowledge BoosteR :

• Density is defined as mass per unit volume.
• Mass is the measure of amount of an object.
• Volume is the measure of quantity of a substance.

★ Formula :-

• $\underline{\boxed{ \sf{Density} = \dfrac{Mass}{Volume} }}$

Answer 2

Answer:-

• Volume=45cm$^3$
• Mass=315g

We know that

$\boxed{\sf Density=\dfrac{Mass}{Volume}}$

$\\ \qquad\quad\sf\Rrightarrow Density=\dfrac{315}{45}$

$\\ \qquad\quad\sf\Rrightarrow Density=7g/cm^3$

Note:-

• SI unit of density is kg/m$^3$
• CGS unit of density is g/cm$^3$