One quality of wheat at Tk. 9.30 per kg is mixed with another quality at a certain rate in the ratio of 8:7. If the mixture so formed be worth Tk. 10 per kg, what is the rate per kg of tge second quality of wheat?

One quality of wheat at Tk. 9.30 per kg is mixed with another quality at a certain rate in the ratio of 8:7. If the mixture so formed be worth Tk. 10 per kg, what is the rate per kg of tge second quality of wheat?
Answer: Tk. 10.80/ kg