By selling a table for ₹$330$, a trader gains $10\%$. Find the cost price of the table.

Given:Selling Price ($\text{SP}$) = ₹$330$ Gain percentage ($\text{Gain}\%$) = $10\%$ Formula for Cost Price ($\text{CP}$):
$$\text{CP}=\frac{\text{SP}}{1+\frac{\text{Gain}\%}{100}}$$
$$\text{CP}=\frac{330}{1+\frac{10}{100}}=\frac{330}{1.1}=300$$
Thus, the cost price of the table is ₹$300$.