



 
Hi Mick. The way to solve this is to subtract the volume of the pipe from the volume of the total space. The space is 12m x 5m x 7m which makes 420 m^{3}. The pipe volume is π (0.6 m)^{2} x 8m = 9.05 m^{3}. So the space surrounding the pipe is 420  9 = 411 cubic meters. That's a whole lot of concrete around it! Are you sure you have the measurements correct? Cheers,  


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