Q.What is the amount realised on selling 8% Stock of 200 shares of Face Value ₹ 100 at ₹ 50 ?

Amount realised on a sale $=$ number of shares $\times$ market price $=200\times 50=₹10{,}000$.

When shares are bought or sold, the money that changes hands is based on the market price (₹50 here), while the face value (₹100) and the rate (8%) are used only for computing dividend/income, not the sale proceeds.

Step — Amount realised:

$\text{Amount}=\text{No. of shares}\times\text{market price}=200\times 50 = ₹10{,}000.$

…