1 Answer

MrOrhan · Answer 1 · 2020-02-26T08:31:18+0000

Answer:

324π in²

Explanation:

The surface area of a sphere is calculated as

A = 4πr² ← r is the radius

Here diameter = 18, hence r = 9, thus

A = 4π × 9² = 4π × 81 = 324π in²

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