Question

1. A dealer gains Rs 36 by selling a toy. 4 points
He gains as much percent as the cost
price of the toy. Find the selling price
of the toy (For square use^symbol
and for square root use sqr root)
​

Answer 1

Answer:

rs 144 selling a toy 4 points percent as the cost

Answer 2

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

Then gain x% Gain Rs.(x×100x)=Rs.100x2

S.P=C.P+Gain =x+100x2

But S.P=Rs.24

⇒x+100x2=24

⇒100x+x2=2400⇒x2+100x−2400=0

⇒x2+120x−20x−2400=0⇒x(x+120)−20(x+120)=0

⇒(x+120)(x−20)=0⇒x=20,−120⇒x=20

Hence the cost price of the toy is Rs. 20