Answer:
Rs. 4 (4 rupees)
Step-by-step explanation:
First you would want to find out the cost of each individual Kg of rice-flour. You could find this by dividing 800 by 10. <This equals 80.
This means that each Kg of flour costs 80 Rupees.
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Now you must find out how much each individual bag of flour sold for.
You could find this by dividing 840 by 10. <This equals 84.
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Now to find the total profit PER bag of flour, you would find the difference of 84 and 80. So 84 - 80 = 4.
The profit per each bag of rice-flour would be 4 rupees. (Rs.)