An agent gets a commission of $2.5 \%$ on the sales of cloth. If on a certain day,he gets Rs. $12.50$ as commission,the cloth sold through him on that day is worth?

$A, B$,and $C$ invested in a business in the ratio of $3:2:5$ respectively. If $A$ earns $100\%$ more profit than $B$ and $C$ earns $40\%$ more profit than $B$,then what is the share of $B$ in the profit?

The total population of a village is $5000$. The number of males and females increases by $10\%$ and $15\%$ respectively,and consequently,the population of the village becomes $5600$. What was the number of males in the village?

Two shopkeepers sell a radio of similar brand and type at the same list price of $₹ 1000$. The first allows two successive discounts of $20 \%$ and $10 \%$,and the second allows two successive discounts of $15 \%$ and $15 \%$. Find the difference in discounts offered by the two shopkeepers.

The price of cooking oil has increased by $15 \%$. The percentage of reduction that a family should effect in the use of cooking oil so as not to increase the expenditure on this account is:

Ravi is $12$ years younger than Surya. Ravi's age is $40 \%$ of the sum of his and Surya's age. What will be Surya's age $9$ years hence?