Find which of the following numbers are cubes of rational numbers:
(i) 
(ii) 
(iii) 0.001331
(iv) 0.04
We have,
= 
Hence, 
We have,
= 
Hence, 
We have,
= 
Hence, 0.001331 is a perfect cube of 
We have,
= 
Hence, 0.04 is not a perfect cube.
5
Find which of the following numbers are cubes of rational numbers:
(i)
(ii)
(iii) 0.001331
(iv) 0.04
We have,
=
Hence,
We have,
=
Hence,
We have,
=
Hence, 0.001331 is a perfect cube of
We have,
=
Hence, 0.04 is not a perfect cube.