Question

The density of copper is 9.86 g/cm3.
Work out the mass of the solid copper cuboid in kg.
the cube is shown up above ..... please someone help me

Answer 1

Answer:

1.479 kg

Step-by-step explanation:

density = mass / volume

9.86 g/cm3 = mass / (3 x 10 x 5)

9.86 = mass / 150

9.86 x 150 = 1479 g

1479 / 1000 = 1.479kg

Answer 2

Answer:

The mass of copper cuboid is 1479g.

Step-by-step explanation:

First you have to find the volume od cuboid using the formula V = length×width×height :

$v = length \times width \times height$

$let \: length = 5 \\ let \: width = 10 \\ let \: height = 3$

$v = 5 \times 10 \times 3$

$v = 150 {cm}^{3}$

Then you have to substitute the volume into the formula of density, ρ = mass/volume :

$ρ = mass \times volume$

$let \: density = 9.86 \\ let \: volume = 150$

$9.86 = \frac{mass}{150}$

$mass = 9.86 \times 150$

$mass = 1479g$