Sonu invested $10 \%$ more than Mona. Mona invested $10 \%$ less than Raghu. If the total sum of their investment is $Rs. 5780$,how much amount did Raghu invest? (in $Rs.$)

Mac buys $200$ shares of par value $Rs. 10$ each,of a company,which pays an annual dividend of $8 \%$ at such a price that he gets $10 \%$ on his investment. Find the market value of one share (in $Rs.$).

$A$ person buys $9 \frac{1}{2} \%$ stock of $Rs.\, 72000$ at $144$. Find his annual income (in $Rs.$).

$A$ man invested $Rs. 14,400$ in $Rs. 100$ shares of a company at $20\%$ premium. If the company declares $5\%$ dividend at the end of the year,then how much does he get? (in $Rs.$)

Find the income on $12\%$ stock of $Rs.\, 60000$ purchased at $Rs.\, 110$. (in $Rs.$)

Find the investment required to purchase $Rs.\, 125000$ of $8 \%$ stock at $92$. (in $Rs.$)