An alloy is to contain copper and zinc in the ratio $9: 4$. Find the quantity of zinc to be melted with $2 \frac{2}{5} kg$ of copper, to get the desired alloy.
A mixture consists of only two components A and B . In 60 litres of this mixture, the components A and B are present in the ratio $2: 1$. What quantity of component B has to be added to this mixture so that the new ratio is $1: 2$ ?
The salaries of $A , B$ and C are in the ratio $2: 3: 5$. If the increments of $15 \%, 10 \%$ and $20 \%$ are allowed respectively in their salaries, then what will be the new ratio of their salaries?
A sample of vinegar was prepared by dissolving 705 ml of acetic acid in 4.7 litres of water. Find the ratio by volume of acetic acid to water in this sample.
The sum of three numbers is 212 . If the ratio of the first to the second is $13: 16$ and that of the second to the third is $2: 3$, then find the numbers.
The ratio of number of boys to the number of girls in a school of 1440 students is $7: 5$. If 40 new boys are admitted, find how many new girls may be admitted to make this ratio $4: 3$.
A certain sum of money is divided among $A, B, C$ in the ratio $5: 6: 7$. If A's share is $₹ 175$, find the total amount and the share of each one of B and C .