An alloy contains zinc, copper and lead in ratio 3:5:4. Copper weighs 20 kg. Total alloy and zinc mass?

Three equal jugs contain milk and water in ratios 1:2, 2:3 and 3:4 respectively. If mixed together, the ratio of milk to water is

A 20 liter mixture contains 30% alcohol and 70% water. If 5 liters of water is added to the mixture, what will be the percentage of alcohol in the new mixture?

A bottle contains spirit and water in the ratio 1 : 4 and another identical bottle contains spirit and water in the ratio 4 : 1. In what ratio should the mixtures in the two bottles be mixed to get a…

A 60 liter mixture of milk and water contains 10% water. How much water must be added to make water 20% in the mixture?

A trader mixes wheat costing ₹40/kg and ₹60/kg in ratio 3:2 and sells half at 25% profit, one-fourth at 10% loss and one-fourth at no profit. Overall profit percentage?