Mohan buys a watch for $Rs.\,350$ and sells it for $Rs.\,392.$ Find out his percentage of profit.
$9$
$12$
$14$
None of these
A reduction of $10 \%$ in the price of rice enables to obtain $25\, kg$ more for $Rs.$ $2250 .$ Find the reduced price per $kg$ of the rice. (in $Rs.$)
A men bought apples at the rate of $8$ for $Rs.\, 34$ and sold them at the rate of $12$ for $Rs.\, 57 .$ How many apples should be sold to earn a net profit of $Rs.$ $45 ?$
Ramesh purchased a bicycle for $Rs.\,5200$ and spent $Rs.\,800$ on its repairs. He had to sell it for $Rs.\,5500.$ Find out his profit or loss percent.
By selling $90$ pens for $Rs.\, 80$ a man loses $20 \%$. What should be the selling price (in $Rs.$) of $90$ pens for $20\%$ profit?
By selling an article for $Rs$ $384,$ a trader gains $20 \%$. Find the cost price of article.