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Pingali Venkayya, who designed the Indian National Flag, served in the British Army in South Africa during the Anglo-Boer War. Later, he became a fervent nationalist and a staunch supporter of Mahatma Gandhi's principles.
A solution contains 10% water. How much water should be added to 30 liters of the sugar and water solution to increase the water content to 25%?
If 50L of liquid containing 20% spirit is added with 15L of water then what would be the percentage of spirit in the resulting mixture?