The percentage profit earned by selling an article for $Rs.\,1920$ is equal to the percentage loss incurred by selling the same article for $Rs.\,1280.$ At what price should the article be sold to make $25 \%$ profit? (in $Rs.$)
$2000$
$2200$
$2400$
Data inadequate
A shopkeeper loses $7 \%$ by selling a cricket ball for $Rs.\,31.$ For how much should he sell the ball so as to $\operatorname{gain} 5 \% ?$ (in $Rs.$)
A trader marked the price of his commodity so as to include a profit of $25 \% .$ He allowed discount of $16 \%$ on the marked price. His actual profit was (in $\%$)
Aditya purchased $14$ shirt $\&\, 25$ pants at $Rs.\,45$ and $Rs.\,55$ respectively what should be the approximate overall average selling price of shirt and pant so that $40 \%$ profit is earned in $Rs.$?
A manufacturer undertakes to supply $2000$ pieces of a particular component at $Rs.\, 25$ per piece. According to his estimates, even if $5 \%$ fail to pass the quality tests, then he will make a profit of $25 \% .$ However, as it turned out, $50 \%$ of the components were rejected. What is the loss to the manufacturer ? (in $Rs.$)
Present age of Bob is equal to Abby's age $8\, years$ ago. Four years hence, the respective ratio between Bob's age and Abby's age will be $4: 5$ at that time. What is Bob's present age? (in $years$)