A farmer sells wheat. He mixes the two types of wheat he grows. 30 kg of the first group costs him ₹900 and 20 kg of the other group costs him ₹1100. At what price per kg should he sell the mixture so as to earn 25% on his average cost?

₹50

Cost of 30 kg sugar = Rs. 900

Cost of 20 kg sugar = Rs. 1100

Total cost of 50 kg sugar = 900 + 1100 = 2000

Cost of mixed 1 kg sugar = \(\frac{2000}{50}\) = 40

SP of mixed 1 kg sugar = 40 × \(\frac{125}{100}\) = 50