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By mixing two brands of dal and selling the mixture at the rate of Rs.354 per kg a shopkeeper makes a profit of 36%. If to every 4 kg of one brand costing Rs.400 per kg, 6kg of other brand is added. Then how much per kg does the other brand cost?

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By mixing two brands of dal and selling the mixture at the rate of Rs.354 per kg a shopkeeper makes a profit of 36%. If to every 4 kg of one brand costing Rs.400 per kg, 6kg of other brand is added. Then how much per kg does the other brand cost?
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Let the cost price of other brand be Rs ‘x’ per kg

 cost price of 10 kg = Rs (4 * 400 + 6 * x)

 = Rs (1600 +6x)

 Selling price of 10 kg = Rs (10 * 354 )

 = Rs.3540

 Therefore 3540 –(1600 + 6x)/1600 + 6x * 100 =36

 1940 – 6x/1600 + 6x = 0.36

 1940 – 6x = 576 + 2.16x

 x=167.15

 so the cost of other brand = Rs.167.15
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