Answer:
3 yards
Explanation:
First, let's convert yards into feet. 189 feet is 63 yards.
Volume=L•W•H L=length W=width H=height
To do this we have to divide the volume by the product of the length and width and it will calculate the height.
Solving for the width:
63÷(7•3)=3 yards <-the depth of the pool