A straight fence is constructed from posts 6 inches wide and separated by lengths of chain 5 feet long. A certain fence begins and ends with a post. If there are 7 posts, what is the total length of the fence?

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Ответ:

originalbeast6p2799m

28.10.2020

Mathematics

Here's the solution :

In a sphere,

$\boxed{ \mathsf{surface \: \: area = 4\pi {r}^{2} }}$

now, let's solve :

$s = 4 \times \pi \times 5 \times 5$ $s = 100\pi$

hence, correct answer is B. 100π unit²

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