গণিত MCQ
Tea worth Tk. 126 per kg and Tk. 135 per kg are mixed with a third variety in the ratio 1 : 1 : 2. If the mixture is worth Tk. 153 per kg, the price of the third variety per kg will be-
সঠিক উত্তর
Tk. 175.50
⇒ Quantity of cheaper : Quantity of Dearer = (CP of of Dearer - Mean Price) : (Mean Price - CP of Cheaper)⇒ (CP of of Dearer - Mean Price) : (Mean Price - CP of Cheaper) = Quantity of cheaper : Quantity of Dearer⇒ (x - 153) : (153 - 130.50) = 1 : 1⇒ x - 153 = 153 - 130.50⇒ x = 22.5 + 153∴ x = 175.5