Answer : 4.34 %
Explanation: The effective interest rate a company pays on its debt obligation is called cost of debt. The cost of debt is denoted by [k]x_{d}[/tex] . As there is a tax shield available on debt interest it is generally calculated by subtracting the marginal tax rate from before tax cost of debt .
.

where,
c= coupon payment = 1000 * 6% = 60
p = current market price = $898
t= marginal tax rate
therefore :-
=

= 4.34 %