if selling price of a product is Rs 56 and its profit is equal to cost price, what is cost price ?
Let the CP of the product = Rs. x
SP of the product = Rs. 56
profit = CP = Rs. x
Now, profit = SP - CP
⇒ x = 56 - x
⇒x + x = 56
⇒ 2x = 56 ⇒ x = 56 / 2 = 28
so, CP = Rs. 28