Question

How many kilograms of wheat, priced at Rs 6.4/kg, should be mixed with 10 kg of gram flour priced at Rs 4.8/kg, such that by selling the mixture at a 20% profit, the selling price   is Rs. 1.12 more than the average cost price per kg of both varieties of the mixture?

A 20 kg
B 15 kg
C 10 kg
D 12 kg
E none of these
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