Subject Experts Solutions for Chapter: Direct and Inverse Proportions, Exercise 3: SUMMATIVE ASSESSMENT

It is given that, $l$ varies directly as $m$. Find the constant of proportion $k$, where $l$ is $6$ and $m$ is $18$.

The students of Anju's class sold posters to raise money. Anju wanted to create a ratio for finding the amount of money her class would make for different numbers of posters sold. She knew they could raise $₹250$ for every $60$ posters sold.
Could Anju's class raise exactly $₹2000$? If so, how many posters would they need to sell? If not, why?
 

$1000$ soldiers in a fort had enough food for $20$ days. But some soldiers were transferred to another fort and the food lasted for $25$ days. How many soldiers were transferred?

 

A certain number of men can finish a piece of work in $100$ days. If however, there were $10$ men less, it would take $10$ days more for the work to be finished. How many men were there originally?


 

A recipe for a particular type of muffins require $1$ cup of milk and $1.5$ cups of chocolate. Riya has $7.5$ cups of chocolate. If she is using the recipe as a guide, then how many cups of milk will she need to prepare muffins?

Mohan, a student of class $\mathrm{VIII}$, has a lot of friends. It is his birthday so, he bought $3$ toffees for each one of his $32$ classmates. But on that day only $24$ students were present. If each student get $k$ toffees, then find the value of $k$.

Fill the table with suitable values:

Fill the table with suitable values: