Question

Bisecting Bakery sells cylindrical round cakes. The most popular cake at the bakery is the red velvet cake. It has a radius of 17 centimeters and a height of 13 centimeters.

If everything but the circular bottom of the cake was iced, how many square centimeters of icing is needed for one cake? Use 3.14 for π and round to the nearest square centimeter.

3,203 cm2
2,295 cm2
1,020 cm2
731 cm2

Answer 1

2,295 cm2

Explanation:

Answer 2

(b) 2295 cm²

Explanation:

You want the area of icing on a cake 13 cm high and 17 cm in radius.

Icing area

The area of the top is ...

A = πr²

The area of the side is ...

A = 2πrh

Then the total area of icing on the cake is ...

πr² +2πrh = πr(r +2h)

= 3.14(17 cm)(17 cm + 2·13 cm) = 2295.34 cm²

The area of icing needed for the cake is about 2295 cm².

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