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, let's calculate the total number of man-days spent on the job.
$$\text{Total number of workers}=5$$

$$\text{Total number of days}=8$$

$$\text{Total Man-days}=\text{Total workers}\times \text{Total days}$$

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

The daily wage of a single worker is given as $\text{Rs. }400$.
Therefore, the total wage paid to all workers is calculated as:

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

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