How many kgs of wheat costing Rs. 8 per kg must be mixed with 40 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?
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Q:
How many kgs of wheat costing Rs. 8 per kg must be mixed with 40 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?
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