2007-02-17 14:21:38 · 5 answers · asked by duke_stingray 2 in Entertainment & Music ➔ Jokes & Riddles
A diameter of zero or four.
For area and circumference to be equal, then:
2*pi*r = pi*r*r
=> 2*pi*r - pi*r*r = 0
=> r(2*pi - pi*r) = 0
=> r = 0 or 2*pi - pi*r = 0
=> r = 0 or 2*pi = pi*r
=> r = 0 or r = 2
Since diameter, d = 2r, we have:
d = 0 or d = 4
2007-02-17 14:26:29 · answer #1 · answered by Groucho Returns 5 · 0⤊ 0⤋
Diameter=4 Radius=2
2pi*2=4pi
pi*2^2=4pi
2007-02-17 14:24:56 · answer #2 · answered by Nick R 4 · 0⤊ 0⤋
2 * pi * r = pi * r ^ 2
2 * pi / pi = r ^ 2 / r
2 = r
Radius = 2, therefore the diameter = 4
2007-02-17 14:29:24 · answer #3 · answered by stephanie jean 1 · 0⤊ 0⤋
the diameter would also be 4!
2007-02-17 14:25:52 · answer #4 · answered by XbeautifulXdisasterX 2 · 0⤊ 0⤋
The square root of sixty-eight and a third.
2007-02-17 14:40:03 · answer #5 · answered by Anonymous · 0⤊ 0⤋