Answer :

90/9 = 10, the length of the pool.  This can be proven as 10 x 9 = 90²

Answer:

Step-by-step explanation:

alright, lets get started.

The area of the rectangle is given by the formula : [tex]length*width[/tex]

Suppose the length of the pool is l

area is given as 90 and width is given as 9

Plugging the values in formula:

[tex]90=9*l[/tex]

Dividing 9 in both sides

[tex]l=\frac{90}{9}=10[/tex]

So, the length of the pool is 10 meters.  :  answer

Hope it will help :)