Harkesh bought a certain quantity of tomato at the rate of $Rs.\,1500$ per quintal. $10 \%$ of the tomato was spoiled. At what price in $Rs.$ per quintal should he sell the remaining to gain $20 \%$ of his outlay?
$1800$
$2000$
$2200$
$2400$
If the cost price of $21$ watches is equal to the selling price of $18$ pieces, then what would be the gain percent in this transaction?
A man sells an article at a loss of $5 \% .$ If he had bought it at $20 \%$ more and sold it for $Rs.\,115$ less, he would have made a loss of $40 \% .$ Find the cost price of the article.
A person incurs $5 \%$ loss by selling a watch for $Rs.\,1140 .$ At what price should the watch be sold to earn $5 \%$ profit in $Rs.$?
The marked price of a piano was $Rs.\, 15,000$. At the time of sale, there were successive discounts of $20 \%$ $10 \%$ and $10 \%$ on it. The sale price was (in $Rs.$)
The cost price of $40$ articles is the same as the selling price of $25$ articles. Find the gain percent.