Question

要铺满一个长 $12$ 英尺、宽 $9$ 英尺的长方形地板，需要多少平方码地毯？（一码等于三英尺。）

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.)

$12$

$36$

$108$

$324$

$972$

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一边长 $12$ 英尺，即 $\dfrac{12}{3} = 4$ 码。

另一边长 $9$ 英尺，即 $\dfrac{9}{3} = 3$ 码。

因为尺寸是 $4 \text{ yards} \times 3 \text{ yards}$ ，所以面积为平方码。 $4\cdot3 = 12.$

所以正确答案是 A。

Since one side is $12$ feet, it would be $\dfrac{12}{3} = 4$ yards.

Since another side is $9$ feet, it would be $\dfrac{9}{3} = 3$ yards.

Since the dimensions are $4 \text{ yards} \times 3 \text{ yards},$ the area is equal to $4\cdot3 = 12.$

Thus, the correct answer is A .