### 1.4.1.3.2 The Duck

Disinfectant for the toilet is essentail and a good sales product. It has been supplied by two firms who control most of the market

One day Firm A were cauh=ght unawares because firm B had brought out a bew disinfectant bottle with a twisted neck This allowed the housewife to squirt the disinfectant easily under the lip of the bowl. Because of the shape of the neck it was called the Duck. Firm B dramatically improved their share of the market at the expense of firm A

Firm A assembled all their mathematicians that Fridayy and said that they would have food sent in but no-one could go home till they had designed an equivalent duck. This is quite a complicated geometical and fluid flow problem. The mathematicans completed the jopb.

Firm A marketed their Duck and the market shares returned to what they were before