How did it become scarce over the years?

How human evolution take place over the years?

A man saved रु 16,500 in 10 years. In each year after the first he saved 100 more than he did in the preceding year. How much did he save in the first year?

A man saved ₹16500 in ten years. In each year after the first he saved ₹100 more than he did in the preceeding year. How much did he save in the first year?

A man saved Rs. 16500 in ten years. In each year after the first he saved Rs. 100 more than be did in the receding year. How many did he save in the first year?

A man saved Rs.16500 in ten years.In each year after the first he saved Rs.100 more than be did in the receding year.How many did he save in the first year?