1.  By mixing two brands of tea and selling the mixture at the rate of ₹ 177 per kg. a shopkeeper makes a profit of 18%. If to every 2 kg of one brand costing ₹ 200 per kg, 3 kg of the other brand is added, then how much per kg does the other brand cost?
A. ₹ 110
B. ₹ 120
C. ₹ 140
D. None of these

Answer: Option D

Explanation:

Let the cost of the brand be ₹ X per kg.

 C.P. of 5 kg = (2 x 200 + 3 x X) = ₹ (400 + 3X)

 S.P of 5 kg = ₹ (5 x 177) = ₹ 885

 [885 - (400 + 3X)]/(400 + 3X) x 100 = 18

 24250 – 150X = 3600 + 27X

 177X = 20650 => X = 116 

So, cost of the other brand = ₹ 116.66.