By mixing two brands of tea and selling the mixture at the rate of Rs. 177 per kg, a shopkeeper makes a profit of 18%. If to every 2 kg of one brand costing Rs. 200 per kg, 3 kg of the other brand is added, then how much per kg does the other brand cost?

Using the profit percentage, the cost price of the mixture is found by dividing 177 by 1.18, yielding Rs 150 per kg. Mixing 2 kg of the first brand at Rs 200 with 3 kg of the second brand at Rs x per kg gives a total cost of 400 plus 3x for 5 kg of tea. Setting the average cost to 150 per kg, we solve 400 plus 3x equals 750, which means 3x equals 350 and x is Rs 116.67. Because this exact value is not present among the listed numbers, the answer is none of these.

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