A doll is solid for RS 220 What was the cost of doll if rate of profit was 10% of cost?

Explanation

To find the cost of the doll when it is sold for Rs. 220 with a profit rate of 10%, we can use the following formula:

$\text{Selling Price}=\text{Cost Price}+\text{Profit}$

Given that the profit is 10% of the cost price, we can express the profit as:

$\text{Profit}=0.10\times \text{Cost Price}$

Let the cost price be $C$. Therefore, the selling price can be expressed as:

$\text{Selling Price}=C+0.10C=1.10C$

We know the selling price is Rs. 220, so we can set up the equation:

$1.10C=220$

Now, we can solve for $C$:

$C=\frac{220}{1.10}=200$

Thus, the cost of the doll was Rs. 200.

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