Question

The cost of $5$ kilograms of sugar is $72$ rupees. Find out the cost of $15$ kilograms of sugar.

Answer 1

Use Unitary method

We have given that the cost of $5$ kilograms of sugar is $72$ rupees.
We will first find the cost of $1$ $ki\log ram$ of sugar.
So, the cost of $1kg$ of sugar is $₹\frac{72}{5}$
Therefore, the cost of $15$ kilograms of sugar is calculated as, $₹\frac{72}{5}\times 15$
On solving the above expression, we will get,
$$\begin{gathered} \frac{72}{5}\times 15 \\ =72\times 3 \\ =₹216 \end{gathered}$$

Therefore, The cost of $15$ kilograms of sugar is$₹216$