Question

a book is sold with taking the profit of same %as cost price if the sale price is Rs 24 find the cost value ​

Answer 1

Step-by-step explanation:

Let the cost price of the toy be Rs. x.

Then gain x% Gain Rs.(x× x/100x)=Rs. x^2/100

S.P=C.P+Gain =x^2/100

But S.P=Rs.24

x+x^2/100=24

⇒100x+x^2

=2400

⇒x^2+100x−2400=0

⇒x^2+120x−20x−2400=0⇒x(x+120)−20(x+120)=0

⇒(x+120)(x−20)=0⇒x=20,−120⇒x=20