Question

The density of aluminium is 2,700 kg m-3. What is the mass of a block of aluminium which
occupies a volume of 5m-³?

Answer 1

Explanation:

Density of aluminium, which is  

2700

k

g

.

m

3

, i.e. mass per cubic meter. However, dimensions of block of aluminium is given in cubic centimeter. Hence, we should convert volume in cubic meters.

As  

1

c

m

.

=

0.01

m

=

1

100

m

, we have  

1

cubic centimeters equal to  

1

1000000

cubic meters

and  

20

c

m

3

=

20

1000000

m

3

As  

Mass

=

Density

×

Volume

mass of a block of aluminium  

20

c

m

3

is

20

1000000

×

2700

k

g

=

54

1000

k

g

=

54

grams.

Answer 2

Answer:

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