How was the size of the british empire described

The size of the British Empire is described as:

"Between 1815 and 1914, a period referred to as Britain's "imperial century" by some historians, around 10,000,000 square miles (26,000,000 km2) of territory and roughly 400 million people were added to the British Empire."

1. the taxes paid are used to the government in developing its country 2. its also used to build community centers where people would go to spend some valuable time with each other3. the taxes are may also be used to pay some public health sectorhope i'll be