During the regime of which Sultan was the Khalisa land developed on a large scale?

Which Sultan demanded half the crops on land after measurement as revenue?

The Sultan who is said to have raised the land revenue to one-half of the produce was

Which Sultan of Delhi assumed the title of Alexander the Great –

Which Sultan of Delhi was the first to charge ‘Ghari’ or House-tax?

Which Ruler of Delhi Sultanate declared himself as "Khalifa"?