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A cost-minimising firm produces output (q) using capital and labour as productive inputs. If, at the cost-minimising quantiti

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Answer #1

The marginal rate of substitution of K for L = -2

MRTS(K,L) = MPK/MPL = -2

Ratio's between the marginal productivity of factors (K,L)

negative sign shows there is a negative relationship between capital and labour

the wage rate of labour = MPL

the rental rate of capital = MPK

since, MPK/MPL = 2

MPK = MPL*2 = 10

The rental rate of capital equal to 10

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