Answer:
output per worker will increase by less than 5,000
Explanation:
Capital per hour worked increased:
From $40,000 to $50,000
Real GDP per worker grew:
From $20,000 to $25,000
Therefore,
Real GDP per worker grew by = 25,000 - 20,000
= 5,000
Initially marginal product of capital is 5,000, because as we increase output there is diminishing marginal returns, hence, the output per worker will increase by less than 5,000.