Direct Proportion

If combined daily wage of $5$ men is $₹ 3750$, how much will $20$ men earn in a week?

If sam spends $\frac{3}{4}$ of his salary and Tony spends $\frac{1}{2}$ of his salary, is it necessary that Sam's expenditure is more than Tony's?

If $x\propto y$ then show that $\left(x^3+y^3\right)\propto xy\left(x+y\right)$.

$A\text{ and} B$ started the work alternatively starting with $A$. On last day, $A$ completed the work by doing $12.5\%$ of the whole work. Which of the following can ba the possible value of time taken by $B$ alone to do that work if $A$ alone can do the whole work in $6$ days.

Ravi starts for his school at $8:20$ am on his bicycle. If he travels at a speed of $10$ km/hr , then he reaches his school $8$ minutes late but if he travels at a speed of $16$ km/hr he reaches the school $10$ minutes early.

What is the distance between school and his home$?$

If $x \text{and} y$ vary directly, the missing entry in the following table.

In an aquarium there are $9$ fishes which consume $54$ ounce of food every day. If $3$ more fishes are introduced in the aquarium, how much total food is consumed every day.

If $\frac{2}{3}x=\frac{1}{7}y$ then find the value of $x:y.$

What is direct and inverse variation.

If Tuition fees of $3$Subjects are of $₹8500$, then what will be the fees of per Subject ?

What is the formula for direct proportion?

$A$ and $B$ can complete a piece of work in $20$ days, $B$ and $C$ in $15$ days and $C$ and $A$ in $12$ days. If they completed the work together in $k$ days, find $k$.