Sumon bought 2 varieties of rice, costing Taka 8 per kg and Take 12 per kg each and mixed them in some ratio. Then he sold th...

Sumon bought 2 varieties of rice, costing Taka 8 per kg and Take 12 per kg each and mixed them in some ratio. Then he sold the mixture at Taka 12 per kg. making a profit of 20%, What was the ratio of the mixture ?