Cake DesignerI am planning a birthday for my friend, and am inviting 50 friends. They're all really picky and will whinge if they don't get exactly 20 cm squared of icing on the birthday cake. I really want to make sure the party is a success. I have a ribbon that spells HAPPY BIRTHDAY which is 1.3m long and needs to go perfectly around the edge of the cake. How big should I make my rectangular cake?
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I suggest you write down all the important information so you don't forget it! :-D