2018 AMC 12B Problem 1

Problem 1 of 25EasierGeometry

Kate bakes a

20

-inch by

18

-inch pan of cornbread. The cornbread is cut into pieces that measure

2

inches by

2

inches. How many pieces of cornbread does the pan contain?

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Solution

The pan has area

20\cdot18=360

square inches, and each piece has area

2\cdot2=4

square inches. The number of pieces is

\dfrac{360}{4}=90.

Thus, the correct answer is A.

Concepts: area

Problem text and solution from the LIVE past-contest archive. See also the AoPS wiki page for community solutions.