Question about Casio FX-115ES Scientific Calculator

# Acenrifugle fan of200mm dia. turning at30000 rpm -how many cubic metresof air will it move?

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• Casio Master

That depends on, among other things, the shape and pitch of the blades. If the pitch is zero the fan will move essentially no air.

Posted on Nov 20, 2013

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Posted on Jan 02, 2017

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volume of a cylinder = height time Pi r squared

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so 109 x 3.14 x 21.5squared = 158209.69 cubic cm

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so 158.20969 litres

with a more correct value for Pi is actually 158.28993 Litres

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