Q. A merchant gets $₹ 1160$ by selling article $\mathrm{A}$ at $30 \%$ profit and $B$ at $20 \%$ loss. He gets the same amount if he sells $\mathrm{A}$ at $20 \%$ loss and B at $5 \%$ profit. The cost price of article $B$ is__
Ratio, Proportion and Variation
Solution: