To create a mixture that costs ₹110 per kg , 30 kg of one type of rice is combined with 60 kg of another type of rice that costs ₹100 per kg.

Correct option is C

Given:
Quantity of Rice 1 = 30 kg
Cost of Rice 1 = Unknown (Let's call it 'x' ₹/kg)
Quantity of Rice 2 = 60 kg
Cost of Rice 2 = ₹100/kg
Cost of Mixture = ₹110/kg
Formula Used:
​$$\text{Cost of Mixture} = \frac{\text{Total Cost of Rice 1} + \text{Total Cost of Rice 2}}{\text{Total Quantity of Rice 1} + \text{Total Quantity of Rice 2}}$$​​
Solution:
Total cost of Rice 1 = 30 kg $$\times$$​ x ₹/kg = 30x ₹
Total cost of Rice 2 = 60 kg$$\times$$₹100/kg = ₹6000
Total quantity = 30 kg + 60 kg = 90 kg
₹110/kg = $$\frac{(30x + ₹6000) }{ 90 \text{kg}}$$​​
110 $$\times$$​ 90 = 30x + 6000
9900 = 30x + 6000
3900 = 30x
x = $$\frac{3900 }{30}$$​​
x = ₹130/kg
Therefore, the cost of the first type of rice is ₹130 per kg.

Thus, option (C) is right.