How much water should be added to 60 liters of milk costing \(1\frac{1}{2}\) per liter at ₹ 20 to get a mixture costing ₹\(10\frac{2}{3}\) per liter?

How much water should be added to 60 liters of milk costing \(1\frac{1}{2}\) per liter at ₹ 20 to get a mixture costing ₹\(10\frac{2}{3}\) per liter?
20₹ में \(1\frac{1}{2}\) लीटर कीमत वाले 60 लीटर दूध में कितना पानी मिलाया जाना चाहिए कि ₹ \(10\frac{2}{3}\) प्रति लीटर कीमत का मिश्रण प्राप्त हो?

7 liter 9 liter 8 liter 15 liter