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# If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?

Option :

Explanation:

Solution:
$\begin{array}{rl}& \text{Let}\phantom{\rule{thinmathspace}{0ex}}\text{the}\phantom{\rule{thinmathspace}{0ex}}\text{required}\phantom{\rule{thinmathspace}{0ex}}\text{weight}\phantom{\rule{thinmathspace}{0ex}}\text{be}\phantom{\rule{thinmathspace}{0ex}}x\phantom{\rule{thinmathspace}{0ex}}\text{kg}.\\ & \text{Less}\phantom{\rule{thinmathspace}{0ex}}\text{weight,}\phantom{\rule{thinmathspace}{0ex}}\text{less}\phantom{\rule{thinmathspace}{0ex}}\text{cost}\phantom{\rule{thinmathspace}{0ex}}\left(\text{Direct}\phantom{\rule{thinmathspace}{0ex}}\text{Proportion}\right)\\ & \therefore 250:200::60:x\phantom{\rule{thinmathspace}{0ex}}\phantom{\rule{thinmathspace}{0ex}}\phantom{\rule{thinmathspace}{0ex}}⇔\phantom{\rule{thinmathspace}{0ex}}\phantom{\rule{thinmathspace}{0ex}}\phantom{\rule{thinmathspace}{0ex}}250×x=\left(200×60\right)\\ & ⇒x=\frac{\left(200×60\right)}{250}\\ & ⇒x=48\end{array}$