Find the ratio in which rice at Tk. 7.20 a kg be mixed with rice at Tk. 5.70 a kg to produce a mixture worth Tk. 6.30 a kg.

Question: Find the ratio in which rice at Tk. 7.20 a kg be mixed with rice at Tk. 5.70 a kg to produce a mixture worth Tk. 6.30 a kg.Solution:Quantity of rice at Tk. 7.20 per kg = xQuantity of rice at Tk. 5.70 per kg = yBy the rule of alligation:⇒ x : y = (7.20 - 6.30) : (6.30 - 5.70) = 0.9 : 0.6 = 9 : 6 = 3 : 2