The average salary of 20 workers in an office is ₹ 1300 per month. If the manager's salary is also added, then the average salary becomes ₹ 2000 per month. What is the manager's salary?
1
₹ 16,000 per month
2
₹ 12,000 per month
3
₹ 24,000 per month
4
₹ 20,000 per month