In: Economics
Answer: K: L = 1:4
Solution : Given the production function as:
q = 5 KL. .....(1)
Where K= capital and L = labor
Also, given the price of labor and capital:
PL = w = $20
PK = r = $80
Least cost combination of capital and labor will be :
MPL/ MPK = w/ r. ...... (2)
From equation(1)
MPL= dq/dL= 5K
MPK = dq/dK = 5L
Put the above values in equation(2).
5K/ 5L= 20/80
K/L = 1/4
K:L =1:4 or L =4K