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If the number of units in the circumference of a circle is the same as

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If the number of units in the circumference of a circle is the same as  [#permalink]

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New post 16 Nov 2017, 22:59
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A
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C
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E

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88% (00:34) correct 13% (00:26) wrong based on 16 sessions

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If the number of units in the circumference of a circle is the same as the number of square units in its area, then the diameter of the circle is

(A) 2
(B) π
(C) 4
(D) 2π
(E) π^2

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Re: If the number of units in the circumference of a circle is the same as  [#permalink]

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New post 17 Nov 2017, 02:04
Circumference of circle= Area of Circle
\(\pi\)d= \(\pi\)\(d^2\)/4

So d=4

Answer: C.
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Re: If the number of units in the circumference of a circle is the same as  [#permalink]

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New post 17 Nov 2017, 08:32
Bunuel wrote:
If the number of units in the circumference of a circle is the same as the number of square units in its area, then the diameter of the circle is

(A) 2
(B) π
(C) 4
(D) 2π
(E) π^2


\(2πr = πr^2\)

\(r = 2\)

So, Diameter = 4, answer will be (C)
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Re: If the number of units in the circumference of a circle is the same as  [#permalink]

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New post 20 Nov 2017, 12:19
Bunuel wrote:
If the number of units in the circumference of a circle is the same as the number of square units in its area, then the diameter of the circle is

(A) 2
(B) π
(C) 4
(D) 2π
(E) π^2


We can create the equation:

πr^2 = 2πr

r = 2

So, the diameter = 4.

Answer: C
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Re: If the number of units in the circumference of a circle is the same as &nbs [#permalink] 20 Nov 2017, 12:19
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