Answer:
8.09%
Explanation:
Semi annual coupon = 1000*(9.25/2)% = 46.25
N = (20*2) = 40
Using Ms Excel to get I/Y
N = 40, PV=-875, PMT = 46.25, FV = 1000
CPT I/Y = I/Y(n, -pv, pmt, fv) * 2
CPT I/Y = I/Y(40, -875, 46.25, 1000) * 2
CPT I/Y = 5.39% * 2
CPT I/Y = 10.78%
After tax cost of debt = 10.78%*(1 - 0.25)
After tax cost of debt = 10.78%*0.75
After tax cost of debt = 0.08085
After tax cost of debt = 8.09%