Mehedi purchased two articles at the same price and sold one at a profit of 20% and the other at a profit of 22.5%. If the difference between the two selling price is Tk. 150, what is the cost price of each of the articles?

Question: Mehedi purchased two articles at the same price and sold one at a profit of 20% and the other at a profit of 22.5%. If the difference between the two selling price is Tk. 150, what is the cost price of each of the articles?

Solution:
Let the cost price of each of the articles = 100.
The selling price of the first watch = 120
and the selling price of the second watch = 122.5
The difference in the selling price = 122.5 - 120 = 2.5

The difference in the selling price = 2.5 if the cost price = 100
If the difference in selling price = 150, then the cost price = (150 × 100)/2.5 = 6000