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Candy Floss

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					                                       Candy Floss
Richard is making Candy Floss – in his kitchen…

He starts with a cylinder of sugar (diameter = 5cm, length = 8cm).

He melts this down.

Then he spins it into a single, long fibre of sugar (a cylinder of cross-sectional diameter
1mm), using his Grandmother’s pedal-driven spinning machine.

What length of Candy Floss (known as ‘Barbe Papa’ in France) does he make?




Solution:
We need to assume that the volume is unchanged by the melting and spinning process.

Let’s call the new length of the sugar L. It will still be a cylinder…

Then,          x 2.52 x 8 =  x 0.052 x L

    x 2.52 x 8
L=                     502 x 8       20000 cm = 200m
     x 0.052

				
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posted:11/18/2011
language:English
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