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pattern layoutJo has a piece of fabric measuring 100cm x 50cm.  Can she make a gym bag big enough to take her trainers?

The easiest bag for her to make is a simple draw-string bag, consisting of a cylinder of fabric on a circular base.  

Measuring her trainers, she found that they were nearly 30cm long and that a piece of string wrapped round both of them measured almost 60cm.

She decided that she should allow 1cm for all seams and an extra 2cm for the slot to contain the draw string at the top (so the seam allowance is 3cm in total for the top).