Question 13

Explanation

We will calculate the combined work rate of Kardi and Anton, then determine the time needed to complete the total work.

Calculating Combined Work Rate

Work rate of each person per day:

• Kardi: $10$ walls/day.
• Anton: $6$ walls/day.

If they work together, their combined rate is:

Calculating Completion Time

The total work to be completed is 56 walls. The time required ($t$) can be calculated by dividing the total work by the combined rate.

We simplify the fraction:

So, the time required for both of them is $3.5$ days.