In what ratio must a grocer mix two varieties of pulses costing ₹ 15 and ₹ 20 per kg respectively so as to get a mixture worth ₹ 16.50 per kg?

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

In what ratio must tea at ₹ 62 per kg be mixed with tea at ₹ 72 per kg so that the mixture must be worth ₹ 64.50 per kg?

In what ratio must water be mixed with milk costing ₹ 12 per litre to obtain a mixture worth ₹ 8 per litre?

The ratios of copper to zinc in alloys A and B are 3 : 4 and 5 : 9 respectively. A and B are taken in the ratio 2 : 3 and melted to form a new alloy C. What is the ratio of copper to zinc in C?

In what ratio sugar at ₹ 30 per kg should be mixed with sugar at ₹ 45 per kg so that on selling the mixture at ₹ 42 per kg there is a profit of 20%?

In what ratio tea at ₹ 240 per kg, should be mixed with tea at ₹ 280 per kg, so that, on selling the mixture at ₹ 324 per kg, there is a profit of 20%?

How much quantity (in kg) of wheat costing ₹ 84 per kg, must be mixed with 81 kg, of wheat costing ₹ 60 per kg, so that on selling the mixture at ₹ 75.9 per kg, there is a gain of 15%?

A drum contains 80 litres of ethanol. 20 litres of this liquid is removed and replaced with water. 20 litres of the mixture is again removed and replaced with water. How much water (in litres) is present in this drum now?

A milkman mixed some water with milk to gain 25% by selling the mixture at the cost price. The ratio of water and milk is respectively.