Capacity of curd in a vessel = 4 litres 500 ml
We know that 1 litre = 1,000 ml
⇒ 4 l × 1,000 ml + 500 ml = 4,500 ml
Capacity of one glass = 25 ml
∴ Number of glasses that can be filled = 4,500 ÷ 25
Therefore, 180 glasses can be filled by the given amount of curd.