Let the purchase price of the motorcycle tire be x.

If a 25% profit is added to the purchase price, then the selling price would be:

Selling Price = Purchase Price + Profit Selling Price = x + 0.25x Selling Price = 1.25x

We know that the selling price of the tire is Rs 300. Therefore, we can set up an equation to solve for the purchase price:

Selling Price = 1.25x 300 = 1.25x

Dividing both sides by 1.25:

x = 300/1.25

x = 240

Therefore, the purchase price of the motorcycle tire is Rs 240 if a 25% profit is added to it and it is sold for Rs 300.