The price of $15$ articles is $₹ 360$ . Find the price of $21$ such articles.

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Solution

Let's find price of $21$ articles:
The price of $15$ articles $= ₹ 360$
The price of $1$ article $= \frac{₹ 360}{15}$
The price of $21$ articles $= \frac{₹ 360}{15} \times 21$
$= ₹ 72 \times 7$
$= ₹ 504$

Hence, the price of $21$ such articles is $₹ 504$ .

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