W = 5.7 metersThe problem asks us to determine the width of the tank, provided the following information:length: 6.25 metersarea: 35.625 meters²The formula for the area of a rectangle is as follows:[tex]\sf A=LW[/tex]Rearrange it for W, the width, by dividing both sides by L:[tex]\sf W=\cfrac{A}{L}[/tex]Substitute the values:[tex]\sf W=\cfrac{35.625}{6.25}[/tex][tex]\sf W=5.7 \ meters[/tex]