Volume & Surface Area
Pick the formula that matches the solid.
The rules
- Rectangular box: V = lwh. Cylinder: V = πr²h. Sphere: V = (4/3)πr³. Cone: V = (1/3)πr²h.
- Surface area adds up the area of every face.
- Be careful with units: cubic for volume, square for area.
- Use the given radius, not the diameter.
Watch out: Using the diameter in place of the radius.
Worked example
A cube has a surface area of 96. What is its volume?
- 6 faces, so each face has area 16.
- Side = 4, volume = 64.
Answer: 64
Try it yourself
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