Practice Sphere Surface Area in Math
Use these practice problems to test your method after reviewing the concept explanation and worked examples.
Quick Recap
The total area covering the curved outer surface of a sphere, given by the formula S = 4\pi r^2.
The 'skin area' of a perfectly round ball—the amount of material needed to cover it with no overlaps.
Example 1
easyFind the surface area of a sphere with radius 7 cm.
Example 2
mediumA sphere has a surface area of 100\pi cm². Find its radius and volume.
Example 3
mediumFind the surface area of a sphere with diameter 10 cm.
Example 4
easyA basketball has a diameter of 24 cm. Find its surface area.
Example 5
hardTwo spheres have radii in the ratio 2:3. Find the ratio of their surface areas. If the smaller sphere has a surface area of 64\pi cm², find the surface area of the larger sphere.