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Given a right circular cylinder with radius 2, what is the height of

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Given a right circular cylinder with radius 2, what is the height of  [#permalink]

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New post 09 Sep 2018, 08:01
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A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

72% (01:13) correct 28% (01:24) wrong based on 38 sessions

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Re: Given a right circular cylinder with radius 2, what is the height of  [#permalink]

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New post 15 Sep 2018, 18:57
Bunuel wrote:
Given a right circular cylinder with radius 2, what is the height of the cylinder?

(1) The circumference of the cylinder is one-fifth the volume.
(2) The volume is 20π.


Formulas:
Volume = πr2h
Circumference= 2πr
It is given that r=2

(1) The circumference is one-fifth the volume.

Circumference = \(\frac{1}{5}\) * Volume

4π = \(\frac{1}{5}\) * 4πh

20π = 4πh

5π=πh

h=5 Sufficient


(2) V = 20π

20 = π4h

h=5 Sufficient

Answer: D
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Re: Given a right circular cylinder with radius 2, what is the height of   [#permalink] 15 Sep 2018, 18:57
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