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How many cylindrical oil drums, with a diameter of 1.5 feet,

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How many cylindrical oil drums, with a diameter of 1.5 feet, [#permalink] New post 24 Nov 2007, 02:52
How many cylindrical oil drums, with a diameter of 1.5 feet, and a length of 4 feet, would be needed to hold the contents of a full cylindrical fuel ank, with a diameter of 12 ft and a length of 60 ft?
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 [#permalink] New post 24 Nov 2007, 05:17
Drum 1

r = 3/4
h = 4

volume = pi*9/16*4 = pi*9/4

Drum 2

r = 6
h = 60

volume = pi*6^2*60 = pi*2160

solve

pi*2160/pi*2.25 = 960

:)
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 [#permalink] New post 24 Nov 2007, 09:47
KillerSquirrel wrote:
Drum 1

r = 3/4
h = 4

volume = pi*9/16*4 = pi*9/4

Drum 2

r = 6
h = 60

volume = pi*6^2*60 = pi*2160

solve

pi*2160/pi*2.25 = 960

:)


yup got 960 too ..same approach

Volume of bigger drum/Volume of smaller drum
  [#permalink] 24 Nov 2007, 09:47
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How many cylindrical oil drums, with a diameter of 1.5 feet,

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