A group of $5$ workers can complete a job in $8$ days. If each worker is paid $\text{Rs. }400$ per day, what is the total wage paid to all workers?

To find the total wage paid to all workers, we calculate the total number of man-days required for the job and multiply it by the daily wage per worker.
Given:

* Number of workers = $5$
* Number of days = $8$
* Daily wage per worker = $\text{Rs. }400$

Step 1: Calculate the total number of man-days worked by the group.

$$\text{Total man-days}=5\times 8=40\text{ man-days}$$

Step 2: Calculate the total wage.

$$\text{Total Wage}=\text{Total man-days}\times \text{Daily wage per worker}$$

$$\text{Total Wage}=40\times 400=\text{Rs. }16,000$$

Therefore, the total wage paid to all workers is $\text{Rs. }16,000$.