2018 AMC 12B Problem 1

Below is the professionally curated solution for Problem 1 of the 2018 AMC 12B, from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2018 AMC 12B solutions, or check the answer key.

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Concepts:area

Difficulty rating: 840

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?

$90$

$100$

$180$

$200$

$360$

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.

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