A man bought $500$ metres of electronic wire at $50$ paise per metre. He sold $50 \%$ of it at a profit of $5 \%$ At what percent should he sell the remainder so as to gain $10 \%$ on the whole transaction?
$13$
$12.5$
$15$
$20$
Suresh purchased a $TV$ set for $Rs.$ $11250 .$ He spent $Rs.\,800$ on installation and $Rs.$ $150$ on transportation. At what price should it be sold so that the profit earned would have been $15 \%$, if no discount was offered? (in $Rs.$)
A shopkeeper sells goods at $10 \%$ loss on cost price, but uses $20 \%$ less weight. What is his profit or loss percentage?
A dishonest dealer use a scale of $90\, cm$ instead of a metre scale and claims to sell at cost price. His profit is in $\%$
Paras Health Care made $3000$ strips of vitamin tablets at a cost of $Rs.$ $4800 .$ The company gave away $1000$ strips of tablets to doctors as free samples. A discount of $25 \%$ is given on the printed price. Find the ratio of profit in $Rs.$ if the price is raised from $Rs.\, 3.25$ to $Rs.\, 4 .25$ per strip and if at the latter price, samples to doctors were done away with.
A sells an article to $B$ for $Rs.\, 45,000$ losing $10 \%$ in the transaction. $B$ sells it to $C$ at a price which would have given a profit of $10 \%$ to $A$. By what per cent does $B$ gain?