How much surface area is contained by a tank that has a radius of 62.5 ft?

How much surface area is contained by a tank that has a radius of 62.5 ft?

• A. 12,300 ft^2
• B. 15,000 ft^2
• C. 9,800 ft^2
• D. 10,500 ft^2

Answer: (A)

Area of a circle is found with A = πr^2. If the tank’s circular boundary has a radius of 62.5 ft, the area inside that boundary is A = π × (62.5)^2 = π × 3,906.25 ≈ 12,279 ft^2, which rounds to about 12,300 ft^2. That matches the option around 12,300 ft^2. The other numbers would come from using different radii or interpreting the surface area as a 3D shape rather than the circular opening area.

Area of a circle is found with A = πr^2. If the tank’s circular boundary has a radius of 62.5 ft, the area inside that boundary is A = π × (62.5)^2 = π × 3,906.25 ≈ 12,279 ft^2, which rounds to about 12,300 ft^2. That matches the option around 12,300 ft^2. The other numbers would come from using different radii or interpreting the surface area as a 3D shape rather than the circular opening area.