3 years ago

A sphere has diameter 28 cm. If the diameter is divided by 2, what is the effect on the surface area?

Mathematics

1 answer:

spayn [35]3 years ago

4 0

Answer:

The surface area is divided by 4.

Step-by-step explanation:

Surface area of a sphere is 4πr².

When the diameter is 28 the radius is 14. So: 4π(14)² = 784π

If you cut the diameter in half you get 14. The radius is now 7.

4π(7)² = 196π.

784/4 = 196 so divided by 4.

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