Question

15 workers can build a well in 48 hours. How many will be required to do the same work in 30 hours?​

Answer 1

Answer:

When h = 48, w = 15. So, the equation of variation is hw = 720. Thus, the number of workers required to do the same work in 30 hours is 24.

Answer 2

In 48 hrs, the wall is built by 15 workers

Thus, in 30 hrs, the wall will be built by

$\frac{15 \times 48}{30} \: workers \: = 24 \: workers$