AMC8 2004
AMC8 2004 · Q1
AMC8 2004 · Q1. It mainly tests Ratios & proportions, Unit conversion.
On a map, a 12-centimeter length represents 72 kilometers. How many kilometers does a 17-centimeter length represent?
在地图上,12厘米长度代表72公里。那么17厘米长度代表多少公里?
(A)
6
6
(B)
102
102
(C)
204
204
(D)
864
864
(E)
1224
1224
Answer
Correct choice: (B)
正确答案:(B)
Solution
We set up the proportion $\frac{12 \text{cm}}{72 \text{km}}=\frac{17 \text{cm}}{x \text{km}}$. Thus $x=102 \Rightarrow \boxed{\textbf{(B)}\ 102}$
我们建立比例 $\frac{12 \text{cm}}{72 \text{km}}=\frac{17 \text{cm}}{x \text{km}}$。因此 $x=102 \Rightarrow \boxed{\textbf{(B)}\ 102}$
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