To solve this problem, we'll use the concept of work and the relation between the working capacities of girls and boys, along with the method of cross-multiplication. We'll also determine if it's a direct or indirect variation.

Step 1: Determine the equivalent work rate

Given:

• $3$ girls work as much as $5$ boys.

This implies the work rate of 1 girl is equivalent to the work rate of $\frac{5}{3}$ boys.

Let the work rate of 1 boy be $x$. Therefore, the work rate of 1 girl is $\frac{5}{3}x$.

Step 2: Calculate the total work rate of 9 girls and 11 boys

The total work rate for 9 girls and 11 boys is: [ 9 \