Calculation
Solution Quantity = 40 litres
⇒ Ratio of dye and water = 2 : 3
⇒ Dye = 16 litres and water = 24 litres
⇒ New ratio = 2 : 5
⇒ dye remains same = 16 litres
⇒ Water = 24 + 16 = 40 litres
⇒ When 1/4 mixture removes
⇒ Dye = 12 litres and water = 30 litres
⇒ Now ratio becomes 2 : 3
⇒ 3 unit = 30
⇒ 1 unit = 10
⇒ 2 unit = 20 litres
⇒ 20 - 12 = 8 litres
⇒ 8 litres extra dye is added