Final answer:
To calculate the amount of icing Mrs. Tucker will pipe around the cake, we determine the perimeter of the cake by adding twice the length and twice the width. The perimeter is 104 cm, so that is the total length of the icing needed.
Step-by-step explanation:
The student is asked to calculate the amount of icing Mrs. Tucker will pipe on the edge of a cake. The cake measures 22 cm in length and 30 cm in width. To find the total length of the icing that will be piped around the cake, we need to calculate the perimeter of the rectangular surface of the cake.
Perimeter is calculated by adding up all the sides of the rectangle. Since a rectangle has two lengths and two widths, the formula is:
Perimeter = 2 x length + 2 x width
For Mrs. Tucker's cake:
Perimeter = 2 x 22 cm + 2 x 30 cm
Perimeter = 44 cm + 60 cm
Perimeter = 104 cm
Therefore, Mrs. Tucker will pipe 104 cm of icing around the cake.