Question

A rectangular block of copper has a mass of 143.584 g and measures 5.05 cm by 2.55 cm by 1.25 cm. Find the density of the copper block.

Answer 1

Density=mass/volume
Volume= 5.05 x 2.55 x 1.25 = 16.096875 cm^3

Density= 143.584/16.096875 
                                               = 8.919992235 g/cm^3

Answer 2

Answer: The density of copper block is, 8.92 g/mL

Explanation :  Given,

Length of copper block = 5.05 cm

Breadth of copper block = 2.55 cm

Height of copper block = 1.25 cm

To calculate the volume of copper block by using the formula of volume of cuboid, we use the equation:

$V=lbh$

where,

V = volume

l = length

b = breadth

h = height

Putting values in above equation, we get:

$V=5.05cm\times 2.55cm\times 1.25cm=16.1cm^3=16.1mL$

Conversion used : $1cm^3=1mL$

Now we have to calculate the density of copper block.

Formula used :

$Density=\frac{Mass}{Volume}$

Given:

Mass of copper block = 143.584 g

Volume of copper block = 16.1 mL

Now put all the given values in this formula, we get:

$Density=\frac{143.584g}{16.1mL}=8.92g/mL$

Therefore, the density of copper block is 8.92 g/mL