2018 AMC 10B 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 whole pan has area

20 \times 18 = 360

square inches. Each piece is

2 \times 2 = 4

square inches. So the number of pieces is

\frac{360}{4} = 90.

Thus, A is the correct answer.

Concepts: area · rectangle

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