AMC8 2015

AMC8 2015 · Q1

AMC8 2015 · Q1. It mainly tests Fractions, Unit conversion.

How many square yards of carpet are required to cover a rectangular floor that is 12 feet long and 9 feet wide? (There are 3 feet in a yard.)

需要多少平方码的地毯来覆盖一个长12英尺、宽9英尺的矩形地板？（1码=3英尺。）

(A) 12 12

(B) 36 36

(D) 324 324

(E) 972 972

Answer

Correct choice: (A)

正确答案：（A）

Solution

Answer (A): The floor is 12 ft = 4 yards long and 9 ft = 3 yards wide, so it will take $4\times 3=12$ square yards of carpet to cover it.

答案（A）：地板长 $12/3\ \text{ft}=4$ 码，宽 $9/3\ \text{ft}=3$ 码，因此需要 $4\times 3=12$ 平方码的地毯来覆盖。

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