Question

Selling an item of ₹ 56 is as much as the percentage as much as its cost price. What is the cost price of the item.

Answer 1

let x be the cost price. so the profit percent is x too

Selling price = x + (x*x)/100
56= x+ x*x/100
56=(100x+x*x)/100

5600=100x +x*x
x²+100x-5600=0
x=40 or x=-140

So

Cost Price=40

Thank you :)