Answer:
Constant of variation is 24.
Step-by-step explanation:
Inverse variation states that a relationship between two variables in which the product is remain constant.
If one variable increases then, the other one decreases in proportion so that the product is unchanged,
if y is inversely proportional to x i.e
or
;where k is the constant of variation.
It is given that 3 identical water pumps takes 8 hours to fill a pool,
since, it will take less time with more pumps, so it is an inverse variation.
By definition of inverse variation;
![time = \frac{k}{pump}](https://tex.z-dn.net/?f=time%20%3D%20%5Cfrac%7Bk%7D%7Bpump%7D)
Substitute the values to solve for k;
![8 = \frac{k}{3}](https://tex.z-dn.net/?f=8%20%3D%20%5Cfrac%7Bk%7D%7B3%7D)
Multiply by 3 to both sides we get;
![8 \times 3 = \frac{k}{3} \times 3](https://tex.z-dn.net/?f=8%20%5Ctimes%203%20%3D%20%5Cfrac%7Bk%7D%7B3%7D%20%5Ctimes%203)
Simplify:
k = 24
Therefore, the constant of variation is, 24