If the circumference of a circle is half the area, what is the radius of the circle?

1 Answer
Gaya3 · Alan P.
Sep 30, 2017

#4# #"units"#

Explanation:

Area of Circle #= 2pir#
Circumference of Circle #=pir^2#

By the question,
#2pir=(pir^2)/2#

Now, Cross-Multiplying...
#=2*2*cancel(pi*r)=cancel(pi*r)*r#
#=>r=2*2#
#=>r=color(blue)4# #"units"#

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