The answer is 75 you could do long division and that will get you the answer.

solve for "w" to get the width
what's the area of a rectangle? length * width, or lw
Answer:
Diameter of tank = 19.5 ft
Step-by-step explanation:
Volume of cylinder = Base area x Height.
Base area = Area of circle

Height = 20 ft.
Volume of tank = 6000 cubic feet .

Diameter of tank = 19.5 ft