The endosperm of an organism has chromosome 30. So the chromosome in root cell is

Solution (By Examveda Team)

The endosperm of an organism has chromosome 30. So the chromosome in the root cell is 20.
The endosperm is triploid, i.e. 3n.
3n = 30
Therefore n = $$\frac{{30}}{3} = 10.$$
Each cell of the root is diploid that will be 2n, that will be 2 × 10= 20