Why is payment of interest a revenue expenditure?

In a government budget, revenue deficit is Rs. 50,000 crores and borrowings are Rs. 75,000 crores. How much is the fiscal deficit?

Categorize the following items into Revenue and Capital Receipts.
Statement-Profits of public sector undertakings.

Categorize the following items into Direct and Indirect Taxes.
Statement-Wealth tax.

State any two sources of non-tax revenue receipts.

Categorize the following items into Revenue and Capital Receipts.
Statement-Borrowings from public.

Categorize the following items into Revenue and Capital Expenditure.
Statement-Loan given to Union Territories.

Define marginal revenue.

Why are the borrowings by the government treated as capital receipts?

Define revenue budget.