Problem Pictures
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PP3 CD-ROM cover

This picture is taken from Problem Pictures Numbers, a CD-ROM of photographs with activities for mathematics teaching.

Screw pump

As the pump turns, water is raised to the top. This type of pump has been used for more than two thousand years.

Which way would you turn the pump to bring water to the top?

If the volume of water travelling up the pump is 16 litres, how much water is produced by turning the pump one revolution?


The photographs and screen images on this website are copyright and may not be reproduced without permission. Copyright Richard Phillips 2001/2009. Page updated 6 October 2009.