Weight/Volume of tank

[Guest]

A stainless steel cylindrical tank has the following dimensions:

Height- 14'
Radius- 6'
Thickness- .25"

Calculate:

A- Weight of the empty tank. Stainless steel weighs 4.538 ounces per cubic inch.

B- Number of gallons the tank will hold. One cubic foot = 7.48 gallons.


My solution for B:

Cylinder volume- pi x r^2 x h

3.14 x 6^2 x 14
3.14 x 36 x 14
3.14 x 504
1582.56 = 1583 ft.^3
1583 x 7.48 = 11840.84 = 11841 gallons.


I am unsure how to calculate A.

[Guest]

Find the total surface area in square feet then convert to square inches then multiply by thickness to get volume of stainless steel metal in the tank shell. this will be in cubic inches then multiply by density of the metal in ounces per cubic inch to get weight then convert ounces to pounds and to tons or whatever.