$10 \ yr$ before,the ratio of ages of $A$ and $B$ was $13: 17$. After $17 \ yr$ from now,the ratio of their ages will be $10: 11$. The present age of $B$ is (in $yr$):

The entry ticket price at a fun park was increased in the ratio $7:9$,due to which the number of visitors (footfalls) decreased in the ratio $13:11$. If the daily collection before the price hike was $₹ 2,27,500$,what is the new daily collection (in $₹$)?

If $U: V = 6: 7$ and $V: W = 21: 6$,then find $U: V: W$.

If the income of $A$,$B$,and $C$ is in the ratio of $2: 5: 11$ and the income of $B$ is ₹ $291$ more than that of $A$,then the income of $C$ is (in ₹).

The electricity bill of a certain establishment is partly fixed and partly varies as the number of units of electricity consumed. When in a certain month $540$ units are consumed,the bill is $Rs. 1800$. In another month $620$ units are consumed and the bill is $Rs. 2040$. In yet another month $500$ units are consumed. The bill (in $Rs.$) for that month would be:

The ratio of the income to the expenditure of a family is $10:7$. If the family's expenses are $Rs. 10500$,then the savings of the family is (in $Rs.$):