Final answer:
A person will usually begin to increase their urine output around 20 to 30 minutes after drinking a large glass of water, as the body works to maintain fluid balance.
Step-by-step explanation:
After drinking a large glass of water, a person will typically start increasing their urine output in about 20 to 30 minutes. This response time can vary slightly depending on individual factors such as hydration level before drinking the water, kidney function, and fluid absorption rate. The process of increased urine production is part of the body's way of regulating fluid balance and ensuring that the excess water consumed is appropriately excreted through the urinary system.