Answer:
21.4%
Explanation:
The formula to calculate the weighted average cost of capital is as follow (In this case the corporate tax is not mentioned so we assume that it's = 0):
wacc = (weight of the firm's debt x cost of debt after-tax) + (weight of the firm's equity x cost of equity)
= (0.6 x 0.29) + (0.4 x 0.1)
= 0.214 = 21.4%