IGCSE Maths / Circles, cylinders, cones and spheres

Reverse volume and surface area problems revision notes

Edexcel International GCSE Maths (4MA1), chapter 12: Circles, cylinders, cones and spheres, specification point 4.10a. Part of the full course.

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Reverse volume and surface area problems give you a measurement and ask you to find a missing length. Substitute the known values, undo the operations in the formula, and use the matching root if the unknown is squared or cubed.

More lessons in Circles, cylinders, cones and spheres

• Circumference of a circle
• Area of a circle
• Semicircles: perimeter and area
• Compound area with circles
• Arc length of a sector
• Area of a sector
• Perimeter of a sector
• Reverse sector problems
• Reverse circle problems
• Volume of a cylinder
• Surface area of a cylinder
• Leaving an answer in terms of pi
• Volume of a cone
• Surface area of a cone
• Volume of a sphere
• Surface area of a sphere
• Hemispheres and compound solids
• Frustums and truncated cones