2023 AMC 12B 第 4 题

Question

Jackson 的画笔能刷出宽

6.5

毫米的窄条。Jackson 的油漆足够刷出

25

米长的一条。Jackson 能用油漆覆盖多少平方厘米的纸？

Jackson’s paintbrush makes a narrow strip with a width of

6.5

millimeters. Jackson has enough paint to make a strip

25

meters long. How many square centimeters of paper could Jackson cover with paint?

162{,}500

162.5

1{,}625

1{,}625{,}000

16{,}250

先把所有长度都换算成厘米，再相乘

Convert every length to centimeters before multiplying

宽度是

6.5\text{ mm}=0.65\text{ cm}

，长度是

25\text{ m}=2500\text{ cm}

The width is

6.5\text{ mm}=0.65\text{ cm}

and the length is

25\text{ m}=2500\text{ cm}

换算单位后，这条窄条宽

0.65

厘米，长

2500

厘米，所以面积为

0.65\times 2500=1625

平方厘米。

因此，正确答案是 C。

Converting units, the strip is

0.65

cm wide and

2500

cm long, so its area is

0.65\times 2500=1625

square centimeters.

Thus, the correct answer is C.

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