What is the circumference of a circle whose area is #16pi#?

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12
Jan 6, 2016

Answer:

#8pi#

Explanation:

The circumference of a circle is #2pir# and the area of a circle is given by #pir^2#
#pir^2 = 16pi#
#:. r = sqrt(16) = 4#
Circumference #=2pir = 2pi*4 =8pi#

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