Question

a man sold his radio set for RS 250 and gained one ninth of it's cost price​

Answer 1

Answer:

Gained = 1/9

Ratio of C.P and S.P

= 9 : 10

10 = 250

than 1 = 25

So CP = 9×25 =225 Ans

Answer 2

Answer:

The cost price of the radio is $225$.

Step-by-step explanation:

Let the cost price of the radio be $x$. Since he gained $\frac{1}{9}x$, we can write

$x+\frac{1}{9}x=250$

$\frac{10}{9} x=250$

$x=\frac{250(9)}{10}$

  $=25(9)=225$

So the cost price is $225$ and $\frac{225}{9}=25$, which he gained. and so the selling price is $225+25=250$.

Hence the answer

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