Which of  the following are advantages of cd-rom as a storage media?

The monthly income of a person was Rs. $13500$and his monthly expenditure was Rs. $9000$. Next year his income increased by $14\%$ and his expenditure increased by $7\%$. The percentage increase in his savings was?

In a business partnership among$A, B, C$ and $D$, the profit is shared as follows 

$\frac{A\text{'}\mathrm{s} \mathrm{share}}{B\text{'}\mathrm{s} \mathrm{share}}=\frac{B\text{'}\mathrm{s} \mathrm{share}}{C\text{'}\mathrm{s} \mathrm{share} }=\frac{C\text{'}\mathrm{s} \mathrm{share}}{D\text{'}\mathrm{s} \mathrm{share}}=\frac{1}{3}$

If the total profit is Rs. $400000$, the share of $C$ is :

A sells a suitcase to B at $10\%$ profit, B sells it to C at $30\%$ profit. If C pays $₹2860$ for it, then the price at which A bought it is: