Question

12 kg. rice costing Rs. 35 per kg. is mixed with 8 kg. of rice costing Rs. 45 per kg. what will be the cost of the mixture per kg ?

Answer 1

We will first calculate the total price of rice we have:

12kg * 35 Rs/kg + 8kg * 45 Rs/kg = 780 Rs

(Note the kg unit cancelling out :) )

Now, we know we have 8kg + 12kg = 20kg of rice costing a total of 780 Rs. We want the price per kg, so we simply divide 780 Rs by 20 kg:

780 Rs / 20 kg = 39 Rs/kg