Acids with 25% and 40% concentrations are mixed to get 60 litres of 30% concentration. How many litres of each kind is needed?

Acid with 25% and 40% concentration are mixed to get 60 litres of 30% concentration. How many litres of each kind is needed?

90% acid solution (90% pure acid and 10% water) and 97% acid solution are mixed to obtain 21 litres of 95% acid solution. How many litres of each solution are mixed.

Express : 60 litres as a percentage of 40 litres

A chemist has 20% and 30% concentration of nitric acid with him. In an experiment, he mixed x mI of 20% concentration and 9 mI of 30% concentration in one container and in another container he mixed 4 mI of the 20% concentration with x ml of the 30% conentration. Surprisingly, the concentration of acid in both containers came out to be same. What is the value of X ( in ml) ?

The diluted wine contains only 8 litres of wine and the rest is water. A new mixture whose concentration is 30%, is to be formed by replacing wine. How many litres of mixture shall be replaced with pure wine if there was initially 32 litres of water in the mixture ?

The diluted wine contains only 8 litres of wine and the rest is water. A new mixture whose concentration is 30%, is to be formed by replacing wine. How many litres of mixture shall be replaced with pure wine if there was initially 32 litres of water in the mixture?