Question

The cost of pure ghee is Rs $x$ per kg. If the price of it is increased by 20 per kg, one gets.......kg of pure ghee in Rs 800 according to new price.

• A. $\frac{800}{x+20}$
• B. $\frac{800}{x-20}$
• C. $\frac{x+20}{800}$
• D. $\frac{800}{x}$

Answer 1

The correct option is A $\frac{800}{x+20}$

Cost of pur ghee for $1kg=Rsx$

If $Rs20$ is increased per $kg$ Then for

$1kg=Rs(x+20)\times 1$

then, $2kg=Rs(x+20)\times 2$

Let us assume $ykg$ of pur ghee costs $Rs800$, then equation becomes

$ykg=Rs(x+20)\times y=Rs800$

Therefore $y=\frac{800}{x+20}$