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

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

anonymous · Answer

24*24

cwrw238 · Answer

total area of cake for 110 guests = 110 *4*4 =  1760

cwrw238 · Answer

so e need to pick 3 of the kist to add up to 1760

anonymous · Answer

since it is three layered , one layer = 1760/3

anonymous · Answer

ill attach the question .

anonymous · Answer

attachment

anonymous · Answer

the ans. is that option which has a sum of 1760.

cwrw238 · Answer

32^2 =  1024
28^2 = 784
24^2 = 576
20^2 = 400
16^2 =256
12^2 = 144
8^2 = 64

which 3 are = to or nearest and > 1760?

cwrw238 · Answer

how about 2nd + 3rd + 4th?

anonymous · Answer

alrighty wll i worked it out & i got answer 'C' ! am i right ? !

anonymous · Answer

*well

cwrw238 · Answer

i can't see your picture
but its 28^2 + 24^2 + 20^2

anonymous · Answer

well then i suppose i got it right because that was answer "C" !

cwrw238 · Answer

yup

cwrw238 · Answer

check it out  784 + 576 + 400 =  1760

anonymous · Answer

Yes it's right ! (: