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Math Student

Guest

Volume of water Passing through a pipe

Hi, I'm a little stuck on this question.

A cylindrical pipe has outer and inner radii of 1.9cm and 1.4cm respectively. Water flows through the pipe at a speed of 50cm/s. Calculate to 3.s.f:

a)the volume of water in cm3 which flows through the pipe in 1 second
b)the volume of water in litres which flows through the pipe in 1 minute

Thank you in advance for your help.

TheDude

Member

Registered: 2007-10-23

Posts: 361

Re: Volume of water Passing through a pipe

Think of it like finding the volume of a cylinder.  The base is a circle with a radius of 1.4 cm (the outer radius is useless information) and the cylinder has a height of 50 cm, because in 1 second the water travels 50 cm.  Then do the same for part b, except that the height is 60s * 50cm/s.

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Wrap it in bacon

Math Student

Guest

Re: Volume of water Passing through a pipe

Okay, so if the area of the opening of the pipe is:

6.157521601 (Pix1.4^2)

Then I multiply that by 50:

307.8760801cm^3 would be the volume of water in 1 second??

And then multiply that by 60 again to get 1 minute:

18472.5648cm^3

And then it would be 18.47 litres (2.d.p)?