Problem 20 of 34geo-020
A water tank in the shape of a right circular cylinder has a diameter of 6 feet and a height of 10 feet. What is the volume of the tank, in cubic feet?
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Solution walkthrough1:22
- A cylinder is a stack of equal circles, so its volume is the area of the base times the height: .
- The formula needs the radius. The diameter is feet, so the radius is feet.
- Put in and : .
- , so cubic feet.
- Traps: skips the square, is the side area , and uses the diameter as .