Question

If the cost of $10kg$ of wheat is $Rs170.50$, then :

Cost of $8kg$ of wheat will be $Rs\_\_\_\_$

Answer 1

Given that,

Cost of $10kg$ of wheat $=$ $Rs170.50$

Assume, cost of $8kg$ of wheat $=$ $Rsx$

In proportion, it can be written as

$10kg:8kg::Rs170.50:Rsx$

Therefore,

$$\begin{gathered} \frac{10kg}{8kg}=\frac{Rs170.50}{x} \\ \Rightarrow x=Rs\frac{170.50\times 8}{10} \\ \Rightarrow x=Rs136.40 \end{gathered}$$

Hence, cost of $8kg$ of wheat will be $Rs136.40$.