Question

You are baking a cake. The recipe calls for a cake pan that is 9 inches by 11 inches by 2 inches.

You have a cake pan that is 10 inches by 10 inches by 2 inches.

What is the surfacearea of the recipe’s cakepan? (The top of the cake pan is open.)

What is the surface area of your cake pan? (The top of the cake pan is open.)

Based upon your answers above, is it okay to use your cake pan for this recipe? Explain.

Answer 1

The recipe's pan has a surface area of 179. To find this, you have to add up all 5 sides. 99 = 22 +22 + 18 + 18

Your pan has a surface area of 180. 100 + 20 + 20 + 20 + 20

Since the difference is only 1 between the pans, it should be safe to use either pan.