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Lorico [155]
3 years ago
11

Marley bakes a rectangular cake that is 20 inches wide, 12 inches long and 6 inches high. She removes the cake from the pan to f

rost it. How many square inches of frosting does she need?
Mathematics
1 answer:
sesenic [268]3 years ago
4 0
We know that
surface area of rectangular cake=area of the base+perimeter of base*height 

<span>only the top area is considered for frosting</span>

area of the base=20*12----> 240 in²

perimeter of the base=2*[20+12]----> 64 in
height=6 in

surface area of rectangular cake=240+64*6----> 624 in²

the answer is
624 in² 

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