Homework Help: geometry 2

Posted by me on Wednesday, May 4, 2011 at 10:58am.

Xenia is ordering a cake for her friend’s wedding. She knows that there will be 110 guests at the wedding, and she is trying to decide how large a cake to order. She has been told that each guest should get a piece of cake that is 4 inches by 4 inches. She would like to buy a tiered, square three-layer cake and is trying to decide which sizes of cakes to order. Which combination of cakes should she get? The available sizes, in inches, are:

geometry 2 - me, Wednesday, May 4, 2011 at 11:03am
32 × 32
28 × 28
24 × 24
20 × 20
16 × 16
12 × 12
8 × 8
geometry 2 - Henry, Thursday, May 5, 2011 at 9:45pm
A = 4 * 4 = 16in^2 / slice,

At=16in^2/slice * 110slices = 1760in^2
needed.

Choose Sizes:
32 x 32 = 1024 in^2.
28 x 28 = 784 in^2.
Total = 1024 + 784 = 1808 in^2.

Surplus = 1808 - 1760 = 48 in^2 = 3
slices.

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