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I need someone to solve this ASAP.-example-1
User WavyGravy
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1 Answer

7 votes

Answer:

320 ft² (nearest whole number)

Explanation:

Given:

  • height of fence post = 8 ft
  • diameter of fence post = 1 ft ⇒ radius = 0.5 ft
  • total number of posts = 12
  • π = 3.14

Surface area of a cylinder = 2πr² + 2πrh

⇒ SA of one fence post = 2 · 3.14 · 0.5² + 2 · 3.14 · 0.5 · 8

= 1.57 + 25.12

= 26.69 ft²

As there are 12 fence posts,

Total paint needed = 12 × 26.69

= 320.28 ft²

= 320 ft² (nearest whole number)

User Rbb
by
9.2k points

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