Question

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:
32 × 32
28 × 28
24 × 24
20 × 20
16 × 16
12 × 12
8 × 8

Answer 1

she should get a 32 by 32

Answer 2

110*(4*4)=1760 Thats the area of the cake required.
32*32=1024
28*28=784
24*24=576
20 × 20=400
16 × 16=256
12*12=144
8 × 8 =64
784+576+400=1760. which means 28,24 and 20 inches cakes.