Single-grain density and bulk density of four varieties of grains are given in the table. If we take 1 kg of each of these, which one will have the largest volume?

Grain	Single-grain density (g/cm³)	Bulk density (g/cm³)
Rice	1.13	0.56
Wheat	1.39	0.80
Millet	1.27	0.77
Maize	0.97	0.68

Correct option is A

Given:

1 kg (1000 grams) of each grain is taken.
Bulk density (g/cm³) of grains is given.
Need to find which grain will have the largest volume.

Formula:
Volume = Mass / Bulk Density
Where Mass = 1000 g for each case.

Solution:

​$$\text{Rice:} \quad \text{Volume} = \frac{1000}{0.56} \approx 1785.71 \, \text{cm}^3 \\\ \\\text{Wheat:} \quad \text{Volume} = \frac{1000}{0.80} = 1250 \, \text{cm}^3 \\\ \\\text{Millet:} \quad \text{Volume} = \frac{1000}{0.77} \approx 1298.70 \, \text{cm}^3 \\\ \\\text{Maize:} \quad \text{Volume} = \frac{1000}{0.68} \approx 1470.59 \, \text{cm}^3 \\[10pt]\\\ \\\text{Comparison:} \quad 1785.71 > 1470.59 > 1298.70 > 1250 \\[10pt]$$​​

Final Answer: (a) Rice