anonymous
  • anonymous
Water flows through a rubber hose 2 cm in diameter at a velocity of 2 m/s. What is the rate of flow in cubic meters per seconds?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
The textbook's explanation says pid^2/4 for some reason. I don't have the slightest idea where 4 came from
anonymous
  • anonymous
Perhaps that is the official formula to get the area of the circle instead of from the radius.
anonymous
  • anonymous
I'd never been accustomed to using this route instead of radius so.

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anonymous
  • anonymous
No, the volume of a circle is pi times radius squared. You can work out the area of the circle using this if you halve the diameter to get the radius.
anonymous
  • anonymous
I guess this sums up to (1cm)^2*pi=3.14cm^2=3.14m^2*10^-3*2m/s=6.28*10^-3m^3/s=rate of flow.
anonymous
  • anonymous
You mean the area of the circle
anonymous
  • anonymous
Thanks anyway

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