Answer:
b) 9.05 percent
Explanation:
The computation of the firm before tax cost of debt is shown below:
The Weight of debt is
= 100 - 70
=30%
Now
WACC = Respective cost × Respective weight
11 = (0.7 × 13) + (0.3 × Cost of debt)
11 = 9.1 + (0.3 × Cost of debt)
Cost of debt = (11 - 9.1) ÷ 0.3
= 6.333%(Approx)
Now
Pre-tax Cost of debt is
= Cost of debt ÷ (1 - tax rate)
= 6.333 ÷ (1 - 0.3)
= 9.05%
hence, the correct option is b.