If the area of a circle is 320 sq. meters, what is the radius and circumference?

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2006-09-24 09:31:18 · 3 answers · asked by sportchick359 2 in Science & Mathematics ➔ Mathematics

Area = 320 = pi*radius^2
radius = sqrt(320/pi) = 10.0925301 meters
Circumference = 2*pi*r = 2*pi*sqrt(320/pi) = 2*pi*10.0925301 = 63.4132368 meters

2006-09-24 09:34:59 · answer #1 · answered by maegical 4 · 1⤊ 0⤋

area=pi r^2=320(given)
r^2=320/pi=101.91
r=(320/pi)^1/2=10.05m
C=2 pi r 63.1m

2006-09-24 16:36:37 · answer #2 · answered by raj 7 · 0⤊ 0⤋

area = pi*r^2 where r = radius
hence sqrt(320/pi) = r

circumference = 2*pi*r = 2*pi*sqrt(320/pi)

2006-09-24 16:39:11 · answer #3 · answered by ? 7 · 0⤊ 0⤋