If an area in the form of a a circle is to be roped off by rope 10m [meter] long , what will be the radius of thi area ? round of you awnser two decimal place wichi the crrect awser it is A 1.28m or B 1.59 or C . 2.56 or D.3.18m

If an area in the form of a a circle is to be roped off by rope 10m [meter] long , what will be the radius of thi area ? round of you awnser two decimal place wichi the crrect awser it is A 1.28m or B 1.59 or C . 2.56 or D.3.18m
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Kaiden Weeks
the circumference of a circle is $C=2\pi r$
you are told C=10m
thus $10=2\pi r$
now solve for r:
$r=10/\left(2\pi \right)$
r = 1.59 m
Not exactly what you’re looking for?
Brenton Dixon
$2\pi r=$ perimeter of a circle
since we have the perimeter (10 m) of this circle we can jus plugin 10 for the perimeter and solve for r:
$10=2\pi r$
$\pi r=5$
$r=\frac{5}{\pi }$
r=1.59
so B is the correct answer