Question

22. A cubic object has sides with lengths of 6.0 cm,

Answer 1

Answer : The correct option is, (3) $4.5g/cm^3$

Explanation :

Density : It is defined as the mass contained per unit volume.

Formula used :

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

First we have to calculate the volume of cuboid.

Formula used :

$V=l\times b\times h$

where,

V = volume of cuboid

l = length of cuboid = 6.0 cm

b = breadth of cuboid = 3.0 cm

h = height of cuboid = 2.0 cm

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

$V=6.0cm\times 3.0cm\times 2.0cm=36cm^3$

Now we have to calculate the density of cube.

Given :

Mass of cube = 162.2 g

Volume of cube = $36cm^3$

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

$Density=\frac{162.2g}{36cm^3}=4.5g/cm^3$

Therefore, the density of cube is $4.5g/cm^3$

Answer 2

Answer:

option 4 =4.505 g/cm³

Explanation:

Density:

Density is equal to the mass of substance divided by its volume.

Units:

SI unit of density is Kg/m3.

Other units are given below,

g/cm3, g/mL , kg/L

Formula:

D=m/v

D= density

m=mass

V=volume

Symbol:

The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.

Given data:

Mass of cube = 162.2 g

density = ?

Volume =  6cm× 3cm×2cm = 36cm³

Solution:

d= m/v

d = 162.2 g/ 36 cm³

d = 4.505 g/cm³