How many kg of wheat costing R8 must be mixed with 36 kg of rice costing Rs. 5.40 per kg so that 20% gain may be obtained by selling the mixture at Rs. 7.20 per kg?
C= 5.4/ kg; d = 8/kg
S.P of mixture = 7.2 Rs.
Profit = 7.2 x 100/120 = 6
Ratio = 20/6 = 10/3
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