Question

A post is put every 6 feet along a fence
around a rectangular field that is 42 fl long
and 36 ft wide. How many posts are needed?

Little urgent​

Answer 1

$\boxed {\underline {\mathbb {FINAL\:ANSWER:-}}}$

$\boxed{26\:posts\:are\:needed\:}$

$\boxed {\underline {\mathbb {GIVEN:-}}}$

• post is put every 6 feet

• along a fence around a rectangular field that is 42 ft long and 36 ft wide

$\boxed {\underline {\mathbb {TO\:FIND:-}}}$

number of posts needed

$\boxed {\underline {\mathbb {FORMULA\:USED:-}}}$

$perimeter \: of\:rectangle =2(l+b)$

$\boxed {\underline {\mathbb {SOLUTION:-}}}$

Length of post $\boxed{ \Longrightarrow {6 feet}}$

Here,

$Length=42 ft. \\Breadth=36 ft.$

Length of the rectangular field  

$=2(l+b)\\=2(42+36)\\=2(78)\\=2 \times 78\\\boxed{=156 ft.}$

Therefore posts needed  

$=\frac{156}{6}\\\boxed{=26\:posts}$

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