The inch in the cake refers to the diameter of the cake, 1 inch is equal to 2.54cm, 4 inches is equal to 10. 16cm, and 6 inches is equal to 15.24cm, so the diameter difference between 4-inch and 6-inch cakes is15.24cm-/kloc. According to the formula of circular area S = π× (d/2) _ (π stands for pi and d stands for diameter), the area of 4-inch cake is π× (10.16 cm/2) _ ≈ 25.8 π c _, and that of 6-inch cake is π× (/kloc-0).
Cake size corresponds to the weight of common cakes and the number of people suitable for eating:
1, 1 pound cake 6 inches, suitable for 2 to 3 people, suitable for birthday parties, Valentine's Day, Mother's Day and other festivals.
2, 2 kg cake 8 inches, suitable for 3-5 people to eat, suitable for birthday parties, various festivals, visiting relatives and friends.
3, 3 kg cake 10 inch, suitable for 5-8 people, suitable for birthday parties, various festivals, visiting relatives and friends.
4, 4 kg cake 12 inch, suitable for 8- 12 people, suitable for birthday parties, various festivals, visiting relatives and friends.
5, 5 kg cake 14 inch, suitable for 12- 16 people, suitable for small and medium-sized activities such as company dinners and classmates' parties.
6, 6 kg cake 16 inch, suitable for 16 people or more, suitable for various medium-sized celebrations.