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

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Joined: 02 Sep 2009
Posts: 55277
Given a right circular cylinder with radius 2, what is the height of  [#permalink]

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09 Sep 2018, 08:01
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Difficulty:

35% (medium)

Question Stats:

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

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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.

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

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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

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

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