3 years ago

I need someone to solve this ASAP.

Mathematics

1 answer:

skad [1K]3 years ago

7 0

Answer:

320 ft² (nearest whole number)

Step-by-step 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)

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