Question

How the find the Density of a piece of iron has a volume of 25cm^3 and mass 195g.

Answer 1

Provided that:

• Volume = 25 cm³
• Mass = 195 g

To calculate:

• Density

Solution:

• Density = 7.8 g/cm³

Using concept:

• Density formula

Using formula:

• D = m/v

Where, D denotes the density, m denotes mass and v denotes volume.

Required solution:

»»» Density = Mass/Volume

»»» D = m/v

»»» D = 195/25

»»» D = 39/5

»»» D = 7.8 g cm³

»»» Density = 7.8 g/cm³

Additional information:

$\begin{gathered}\boxed{\begin{array}{c}\\ {\pmb{\sf{Some \: formulas!}}} \\ \\ \sf \star \: Density \: = \dfrac{Mass}{Volume} \\ \\ \sf \star \: Volume \: = \dfrac{Mass}{Density} \\ \\ \sf \star \: Density \times Volume = Mass \end{array}}\end{gathered}$

Answer 2

• Volume=25cm^3
• Mass=195g

We know

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

$\\ \sf\longmapsto Density=\dfrac{195}{25}$

$\\ \sf\longmapsto Density=7.8g/cm^3$

Note

SI unit of density is kg/m^3