Question

Rohan donated $\frac{1}{5}$ of his salary to an NGO working for the education of old women, $\frac{1}{4}$of his salary on food, $\frac{1}{3}$ on rent and $\frac{1}{15}$ on other expenses. If he is left with Rs. 9000, find his monthly income. What values are being promoted?

Answer 1

Let $x$ be the salary of rohan

$\therefore \frac{x}{5}$ donated to NGO.

$\frac{x}{4}$ on food,;$\frac{x}{3}$ on rent

$\frac{x}{15}$ on others.

Remaining $\Rightarrow x-\frac{x}{5}-\frac{x}{4}-\frac{x}{3}-\frac{x}{15}$

$=x-x\left\{\frac{12+15+20+4}{60}\right\}$

$x-x\times \frac{51}{60}=\frac{9x}{60}$

also, $\frac{9x}{60}=9000\Rightarrow x=60,000.Rs$