Rohit sells two articles for ₹1710. He sells 1st at 10% loss and 2nd at 25% profit. Find the amount of overall profit/loss if the cost price of 1st article is equal to the selling price of 2nd article.

₹90

                    CP       :          SP                     10% = \(\frac{1}{10}\)

1st   →          10       :           9                      25% = \(\frac{1}{4}\)

2nd  →           4        :           5         

Multiply 2nd article's ratios by 2 for getting CP of first  =  SP of 2nd

               CP     :      SP

1st   →     10      :       9

2nd  →      8      :      10

               18     :      19               Profit = 19 - 18 = 1R

Total SP ⇒ 19R = 1710

Profit  ⇒ 1R = 90 Ans.