Half litre of a solution contains 15% of alcohol. To change the alcohol concentration to 50%, find the quantity of alcohol to be mixed.

**Question Statement:** One litre of water is added to 5 litres of an alcohol-water solution havin...

If 30 ml solution of 20% alcohol is mixed with 20 ml solution of 25% alcohol, then what is the stren...

A payment of ₹120 is made with ₹10, ₹5 and ₹2 coins. A total of 25 coins are used. Which of the foll...

The concentrations of three acids, A, B, and C, are specified as 20%, 30%, and 40%, respectively. Th...

If one man adds 6 litres of water to 10 litres of milk and another man adds 4 litres of water to 8 l...

A merchant mixes two varieties of sugar of 5 kg and 3 kg, which costs him ₹4 and ₹6 per kg, respecti...