give the following information about a debenture the post tax cost of the debenture using the approximation formula is per value is equals to rupees $100$ coupon rate is equals to $10$ percentage redemption price is equals to rupees $102$ per debenture net amount realise is equals to rupees $98$ per depends tax $8$ is equals to $0\mathrm{.}35$ number of years to maturity is $8$ years