Question

Find the cost of $4.5$ kg of sugar at Rs. $12$ per $500$ g.

Answer 1

Given: The cost of $500$ g of sugar is Rs. $12$

We know $1\mathrm{kg}=1000\mathrm{g}$

So, $4.5\mathrm{kg}=4500\mathrm{g}$

Now cost of $4500\mathrm{g}$ of sugar $=\frac{4500}{500}\times 12$

$$\begin{gathered} =\frac{{\displaystyle \stackrel{9}{\cancel{45}}}\cancel{0}\cancel{0}}{\cancel{5}\cancel{0}\cancel{0}}\times 12 \\ =9\times 12 \\ =108 \end{gathered}$$

Hence, cost of $4.5\mathrm{kg}$ of sugar is Rs. $108$