Indian Economy
Devaluation of a currency means

reduction in currency value due to wear and tear
reduction in external value/exchange value of currency by the government
all of the listed here
fall in exchange value of a country by market forces

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Indian Economy
Gross domestic capital formation is defined as

expenditure incurred on physical assets only
flow of expenditure devoted to increased or maintaining of the capital stock
production exceeding demand
net addition to stock after depreciation

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